diff --git a/package-lock.json b/package-lock.json
index 3291321..4609dad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,122 +5,126 @@
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           "dev": true
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-              "dev": true
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           "version": "1.1.11",
           "bundled": true,
@@ -3700,118 +3441,30 @@
             "concat-map": "0.0.1"
           }
         },
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-          "version": "2.3.2",
-          "bundled": true,
-          "dev": true,
-          "requires": {
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-            "isobject": "^3.0.1",
-            "repeat-element": "^1.1.2",
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-              "dev": true,
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-              }
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-            "unset-value": "^1.0.0"
-          }
-        },
         "caching-transform": {
-          "version": "1.0.1",
+          "version": "3.0.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "md5-hex": "^1.2.0",
-            "mkdirp": "^0.5.1",
-            "write-file-atomic": "^1.1.4"
+            "hasha": "^3.0.0",
+            "make-dir": "^1.3.0",
+            "package-hash": "^3.0.0",
+            "write-file-atomic": "^2.3.0"
           }
         },
         "camelcase": {
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-          "bundled": true,
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-            "lazy-cache": "^1.0.3"
-          }
-        },
-        "class-utils": {
-          "version": "0.3.6",
+          "version": "5.0.0",
           "bundled": true,
-          "dev": true,
-          "requires": {
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-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "is-descriptor": "^0.1.0"
-              }
-            }
-          }
+          "dev": true
         },
         "cliui": {
-          "version": "2.1.0",
+          "version": "4.1.0",
           "bundled": true,
           "dev": true,
-          "optional": true,
           "requires": {
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-              "version": "0.0.2",
-              "bundled": true,
-              "dev": true,
-              "optional": true
-            }
+            "string-width": "^2.1.1",
+            "strip-ansi": "^4.0.0",
+            "wrap-ansi": "^2.0.0"
           }
         },
         "code-point-at": {
@@ -3819,39 +3472,29 @@
           "bundled": true,
           "dev": true
         },
-        "collection-visit": {
-          "version": "1.0.0",
+        "commander": {
+          "version": "2.17.1",
           "bundled": true,
           "dev": true,
-          "requires": {
-            "map-visit": "^1.0.0",
-            "object-visit": "^1.0.0"
-          }
+          "optional": true
         },
         "commondir": {
           "version": "1.0.1",
           "bundled": true,
           "dev": true
         },
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-          "version": "1.2.1",
-          "bundled": true,
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           "bundled": true,
           "dev": true
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-          "version": "1.5.1",
-          "bundled": true,
-          "dev": true
-        },
-        "copy-descriptor": {
-          "version": "0.1.1",
+          "version": "1.6.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.1.1"
+          }
         },
         "cross-spawn": {
           "version": "4.0.2",
@@ -3863,93 +3506,54 @@
           }
         },
         "debug": {
-          "version": "3.1.0",
+          "version": "4.1.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "ms": "2.0.0"
+            "ms": "^2.1.1"
           }
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-          "bundled": true,
-          "dev": true
-        },
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           "dev": true
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-          "version": "0.2.0",
-          "bundled": true,
-          "dev": true
-        },
         "default-require-extensions": {
-          "version": "1.0.0",
+          "version": "2.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "strip-bom": "^2.0.0"
+            "strip-bom": "^3.0.0"
           }
         },
-        "define-property": {
-          "version": "2.0.2",
+        "end-of-stream": {
+          "version": "1.4.1",
           "bundled": true,
           "dev": true,
           "requires": {
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-              }
-            },
-            "kind-of": {
-              "version": "6.0.2",
-              "bundled": true,
-              "dev": true
-            }
+            "once": "^1.4.0"
           }
         },
         "error-ex": {
-          "version": "1.3.1",
+          "version": "1.3.2",
           "bundled": true,
           "dev": true,
           "requires": {
             "is-arrayish": "^0.2.1"
           }
         },
+        "es6-error": {
+          "version": "4.1.1",
+          "bundled": true,
+          "dev": true
+        },
         "execa": {
-          "version": "0.7.0",
+          "version": "1.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "cross-spawn": "^5.0.1",
-            "get-stream": "^3.0.0",
+            "cross-spawn": "^6.0.0",
+            "get-stream": "^4.0.0",
             "is-stream": "^1.1.0",
             "npm-run-path": "^2.0.0",
             "p-finally": "^1.0.0",
@@ -3958,186 +3562,39 @@
           },
           "dependencies": {
             "cross-spawn": {
-              "version": "5.1.0",
+              "version": "6.0.5",
               "bundled": true,
               "dev": true,
               "requires": {
-                "lru-cache": "^4.0.1",
+                "nice-try": "^1.0.4",
+                "path-key": "^2.0.1",
+                "semver": "^5.5.0",
                 "shebang-command": "^1.2.0",
                 "which": "^1.2.9"
               }
             }
           }
         },
-        "expand-brackets": {
-          "version": "2.1.4",
+        "find-cache-dir": {
+          "version": "2.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "debug": "^2.3.3",
-            "define-property": "^0.2.5",
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-          },
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-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "is-extendable": "^0.1.0"
-              }
-            }
+            "commondir": "^1.0.1",
+            "make-dir": "^1.0.0",
+            "pkg-dir": "^3.0.0"
           }
         },
-        "extend-shallow": {
-          "version": "3.0.2",
+        "find-up": {
+          "version": "3.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "assign-symbols": "^1.0.0",
-            "is-extendable": "^1.0.1"
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-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "is-plain-object": "^2.0.4"
-              }
-            }
+            "locate-path": "^3.0.0"
           }
         },
-        "extglob": {
-          "version": "2.0.4",
-          "bundled": true,
-          "dev": true,
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-              }
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-              }
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-              }
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-              "bundled": true,
-              "dev": true
-            }
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-          "bundled": true,
-          "dev": true,
-          "requires": {
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-            "is-number": "^3.0.0",
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-            "to-regex-range": "^2.1.0"
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-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "is-extendable": "^0.1.0"
-              }
-            }
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-        },
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-          "bundled": true,
-          "dev": true,
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-            "commondir": "^1.0.1",
-            "mkdirp": "^0.5.1",
-            "pkg-dir": "^1.0.0"
-          }
-        },
-        "find-up": {
-          "version": "2.1.0",
-          "bundled": true,
-          "dev": true,
-          "requires": {
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-          }
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-          "version": "1.0.2",
-          "bundled": true,
-          "dev": true
-        },
-        "foreground-child": {
-          "version": "1.5.6",
+        "foreground-child": {
+          "version": "1.5.6",
           "bundled": true,
           "dev": true,
           "requires": {
@@ -4145,36 +3602,26 @@
             "signal-exit": "^3.0.0"
           }
         },
-        "fragment-cache": {
-          "version": "0.2.1",
-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "map-cache": "^0.2.2"
-          }
-        },
         "fs.realpath": {
           "version": "1.0.0",
           "bundled": true,
           "dev": true
         },
         "get-caller-file": {
-          "version": "1.0.2",
+          "version": "1.0.3",
           "bundled": true,
           "dev": true
         },
         "get-stream": {
-          "version": "3.0.0",
-          "bundled": true,
-          "dev": true
-        },
-        "get-value": {
-          "version": "2.0.6",
+          "version": "4.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "pump": "^3.0.0"
+          }
         },
         "glob": {
-          "version": "7.1.2",
+          "version": "7.1.3",
           "bundled": true,
           "dev": true,
           "requires": {
@@ -4187,62 +3634,43 @@
           }
         },
         "graceful-fs": {
-          "version": "4.1.11",
+          "version": "4.1.15",
           "bundled": true,
           "dev": true
         },
         "handlebars": {
-          "version": "4.0.11",
+          "version": "4.1.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "async": "^1.4.0",
+            "async": "^2.5.0",
             "optimist": "^0.6.1",
-            "source-map": "^0.4.4",
-            "uglify-js": "^2.6"
+            "source-map": "^0.6.1",
+            "uglify-js": "^3.1.4"
           },
           "dependencies": {
             "source-map": {
-              "version": "0.4.4",
+              "version": "0.6.1",
               "bundled": true,
-              "dev": true,
-              "requires": {
-                "amdefine": ">=0.0.4"
-              }
+              "dev": true
             }
           }
         },
-        "has-value": {
-          "version": "1.0.0",
+        "has-flag": {
+          "version": "3.0.0",
           "bundled": true,
-          "dev": true,
-          "requires": {
-            "get-value": "^2.0.6",
-            "has-values": "^1.0.0",
-            "isobject": "^3.0.0"
-          }
+          "dev": true
         },
-        "has-values": {
-          "version": "1.0.0",
+        "hasha": {
+          "version": "3.0.0",
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-number": "^3.0.0",
-            "kind-of": "^4.0.0"
-          },
-          "dependencies": {
-            "kind-of": {
-              "version": "4.0.0",
-              "bundled": true,
-              "dev": true,
-              "requires": {
-                "is-buffer": "^1.1.5"
-              }
-            }
+            "is-stream": "^1.0.1"
           }
         },
         "hosted-git-info": {
-          "version": "2.6.0",
+          "version": "2.7.1",
           "bundled": true,
           "dev": true
         },
@@ -4266,248 +3694,135 @@
           "dev": true
         },
         "invert-kv": {
-          "version": "1.0.0",
+          "version": "2.0.0",
           "bundled": true,
           "dev": true
         },
-        "is-accessor-descriptor": {
-          "version": "0.1.6",
-          "bundled": true,
-          "dev": true,
-          "requires": {
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         "is-arrayish": {
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           "bundled": true,
           "dev": true
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-          "bundled": true,
-          "dev": true
-        },
-        "is-builtin-module": {
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-          "bundled": true,
-          "dev": true,
-          "requires": {
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-          }
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-        "is-data-descriptor": {
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-          "bundled": true,
-          "dev": true,
-          "requires": {
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-          "bundled": true,
-          "dev": true,
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-            "is-data-descriptor": "^0.1.4",
-            "kind-of": "^5.0.0"
-          },
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-              "bundled": true,
-              "dev": true
-            }
-          }
-        },
-        "is-extendable": {
-          "version": "0.1.1",
-          "bundled": true,
-          "dev": true
-        },
         "is-fullwidth-code-point": {
           "version": "2.0.0",
           "bundled": true,
           "dev": true
         },
-        "is-number": {
-          "version": "3.0.0",
-          "bundled": true,
-          "dev": true,
-          "requires": {
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-          }
-        },
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-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "is-number": "^4.0.0"
-          },
-          "dependencies": {
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-              "version": "4.0.0",
-              "bundled": true,
-              "dev": true
-            }
-          }
-        },
-        "is-plain-object": {
-          "version": "2.0.4",
-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "isobject": "^3.0.1"
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         "is-stream": {
           "version": "1.1.0",
           "bundled": true,
           "dev": true
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-        "is-utf8": {
-          "version": "0.2.1",
-          "bundled": true,
-          "dev": true
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-        "is-windows": {
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-          "bundled": true,
-          "dev": true
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-          "bundled": true,
-          "dev": true
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         "isexe": {
           "version": "2.0.0",
           "bundled": true,
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@@ -4515,38 +3830,30 @@
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-          "dev": true
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           "dev": true,
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           "dev": true,
           "requires": {
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-          "dev": true
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-          "version": "1.1.0",
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           "dev": true,
           "requires": {
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+            "mimic-fn": "^1.0.0",
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@@ -4564,33 +3871,6 @@
             }
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           "bundled": true,
@@ -4605,75 +3885,42 @@
           }
         },
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-          "version": "0.0.8",
+          "version": "0.0.10",
           "bundled": true,
           "dev": true
         },
-        "mixin-deep": {
-          "version": "1.3.1",
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           "bundled": true,
           "dev": true,
           "requires": {
-            "for-in": "^1.0.2",
-            "is-extendable": "^1.0.1"
+            "minimist": "0.0.8"
           },
           "dependencies": {
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               "bundled": true,
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         "ms": {
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           "bundled": true,
           "dev": true
         },
-        "nanomatch": {
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             "semver": "2 || 3 || 4 || 5",
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@@ -4691,47 +3938,6 @@
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           "bundled": true,
@@ -4755,62 +3961,76 @@
           "dev": true
         },
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-          "version": "2.1.0",
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           "dev": true,
           "requires": {
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-            "lcid": "^1.0.0",
-            "mem": "^1.1.0"
+            "execa": "^1.0.0",
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+            "mem": "^4.0.0"
           }
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+        },
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           "bundled": true,
           "dev": true
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           "dev": true,
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           "dev": true,
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+          "version": "2.0.0",
           "bundled": true,
           "dev": true
         },
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+        "package-hash": {
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           "bundled": true,
           "dev": true,
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+            "graceful-fs": "^4.1.15",
+            "hasha": "^3.0.0",
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-          "bundled": true,
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           "dev": true,
           "requires": {
-            "pinkie-promise": "^2.0.0"
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+          "bundled": true,
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           "bundled": true,
@@ -4822,339 +4042,133 @@
           "dev": true
         },
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-          "version": "1.0.5",
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           "dev": true
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@@ -6849,19 +5667,6 @@
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@@ -6937,38 +5742,36 @@
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-      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.0.1.tgz",
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-      "resolved": "https://registry.npmjs.org/table/-/table-4.0.3.tgz",
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+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.2.3.tgz",
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-        "ajv-keywords": "^3.0.0",
-        "chalk": "^2.1.0",
-        "lodash": "^4.17.4",
-        "slice-ansi": "1.0.0",
-        "string-width": "^2.1.1"
+        "ajv": "^6.9.1",
+        "lodash": "^4.17.11",
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
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-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.2.tgz",
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+          "version": "6.9.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.9.2.tgz",
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             "fast-json-stable-stringify": "^2.0.0",
             "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.1"
+            "uri-js": "^4.2.2"
           }
         },
+        "ansi-regex": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.0.0.tgz",
+          "integrity": "sha512-iB5Dda8t/UqpPI/IjsejXu5jOGDrzn41wJyljwPH65VCIbk6+1BzFIMJGFwTNrYXT1CrD+B4l19U7awiQ8rk7w==",
+          "dev": true
+        },
         "fast-deep-equal": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
@@ -6980,6 +5783,26 @@
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+        },
+        "string-width": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.0.0.tgz",
+          "integrity": "sha512-rr8CUxBbvOZDUvc5lNIJ+OC1nPVpz+Siw9VBtUjB9b6jZehZLFt0JMCZzShFHIsI8cbhm0EsNIfWJMFV3cu3Ew==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.0.0.tgz",
+          "integrity": "sha512-Uu7gQyZI7J7gn5qLn1Np3G9vcYGTVqB+lFTytnDJv83dd8T22aGH451P3jueT2/QemInJDfxHB5Tde5OzgG1Ow==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.0.0"
+          }
         }
       }
     },
@@ -7075,6 +5898,12 @@
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       "dev": true
     },
+    "tslib": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
+      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==",
+      "dev": true
+    },
     "tunnel-agent": {
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       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -7343,9 +6172,9 @@
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-      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
       "dev": true,
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diff --git a/package.json b/package.json
index 1846a97..ac32339 100644
--- a/package.json
+++ b/package.json
@@ -39,14 +39,14 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.2",
-    "eslint": "^5.2.0",
+    "eslint": "^5.14.1",
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     "eslint-plugin-import": "^2.13.0",
     "eslint-plugin-node": "^7.0.1",
     "eslint-plugin-promise": "^3.8.0",
     "eslint-plugin-standard": "^3.1.0",
     "mocha": "^5.2.0",
-    "nyc": "^12.0.2",
+    "nyc": "^13.3.0",
     "supertest": "^3.1.0"
   }
 }