diff --git a/package-lock.json b/package-lock.json
index 69c8337..26d17b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -691,147 +691,28 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
     "coveralls": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.2.tgz",
-      "integrity": "sha512-Tv0LKe/MkBOilH2v7WBiTBdudg2ChfGbdXafc/s330djpF3zKOmuehTeRwjXWc7pzfj9FrDUTA7tEx6Div8NFw==",
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.6.tgz",
+      "integrity": "sha512-Pgh4v3gCI4T/9VijVrm8Ym5v0OgjvGLKj3zTUwkvsCiwqae/p6VLzpsFNjQS2i6ewV7ef+DjFJ5TSKxYt/mCrA==",
       "dev": true,
       "requires": {
         "growl": "~> 1.10.0",
-        "js-yaml": "^3.11.0",
+        "js-yaml": "^3.13.1",
         "lcov-parse": "^0.0.10",
         "log-driver": "^1.2.7",
         "minimist": "^1.2.0",
-        "request": "^2.85.0"
+        "request": "^2.86.0"
       },
       "dependencies": {
-        "aws4": {
-          "version": "1.8.0",
-          "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
-          "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
-          "dev": true
-        },
-        "combined-stream": {
-          "version": "1.0.6",
-          "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
-          "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
-          "dev": true,
-          "requires": {
-            "delayed-stream": "~1.0.0"
-          }
-        },
-        "extend": {
-          "version": "3.0.2",
-          "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
-          "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
-          "dev": true
-        },
-        "form-data": {
-          "version": "2.3.2",
-          "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.2.tgz",
-          "integrity": "sha1-SXBJi+YEwgwAXU9cI67NIda0kJk=",
-          "dev": true,
-          "requires": {
-            "asynckit": "^0.4.0",
-            "combined-stream": "1.0.6",
-            "mime-types": "^2.1.12"
-          }
-        },
-        "har-validator": {
-          "version": "5.1.0",
-          "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.1.0.tgz",
-          "integrity": "sha512-+qnmNjI4OfH2ipQ9VQOw23bBd/ibtfbVdK2fYbY4acTDqKTW/YDp9McimZdDbG8iV9fZizUqQMD5xvriB146TA==",
-          "dev": true,
-          "requires": {
-            "ajv": "^5.3.0",
-            "har-schema": "^2.0.0"
-          }
-        },
         "js-yaml": {
-          "version": "3.12.0",
-          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.12.0.tgz",
-          "integrity": "sha512-PIt2cnwmPfL4hKNwqeiuz4bKfnzHTBv6HyVgjahA6mPLwPDzjDWrplJBMjHUFxku/N3FlmrbyPclad+I+4mJ3A==",
+          "version": "3.13.1",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+          "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
           "dev": true,
           "requires": {
             "argparse": "^1.0.7",
             "esprima": "^4.0.0"
           }
-        },
-        "mime-db": {
-          "version": "1.35.0",
-          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.35.0.tgz",
-          "integrity": "sha512-JWT/IcCTsB0Io3AhWUMjRqucrHSPsSf2xKLaRldJVULioggvkJvggZ3VXNNSRkCddE6D+BUI4HEIZIA2OjwIvg==",
-          "dev": true
-        },
-        "mime-types": {
-          "version": "2.1.19",
-          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.19.tgz",
-          "integrity": "sha512-P1tKYHVSZ6uFo26mtnve4HQFE3koh1UWVkp8YUC+ESBHe945xWSoXuHHiGarDqcEZ+whpCDnlNw5LON0kLo+sw==",
-          "dev": true,
-          "requires": {
-            "mime-db": "~1.35.0"
-          }
-        },
-        "oauth-sign": {
-          "version": "0.9.0",
-          "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
-          "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==",
-          "dev": true
-        },
-        "qs": {
-          "version": "6.5.2",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
-          "dev": true
-        },
-        "request": {
-          "version": "2.88.0",
-          "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
-          "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
-          "dev": true,
-          "requires": {
-            "aws-sign2": "~0.7.0",
-            "aws4": "^1.8.0",
-            "caseless": "~0.12.0",
-            "combined-stream": "~1.0.6",
-            "extend": "~3.0.2",
-            "forever-agent": "~0.6.1",
-            "form-data": "~2.3.2",
-            "har-validator": "~5.1.0",
-            "http-signature": "~1.2.0",
-            "is-typedarray": "~1.0.0",
-            "isstream": "~0.1.2",
-            "json-stringify-safe": "~5.0.1",
-            "mime-types": "~2.1.19",
-            "oauth-sign": "~0.9.0",
-            "performance-now": "^2.1.0",
-            "qs": "~6.5.2",
-            "safe-buffer": "^5.1.2",
-            "tough-cookie": "~2.4.3",
-            "tunnel-agent": "^0.6.0",
-            "uuid": "^3.3.2"
-          }
-        },
-        "safe-buffer": {
-          "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-          "dev": true
-        },
-        "tough-cookie": {
-          "version": "2.4.3",
-          "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
-          "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
-          "dev": true,
-          "requires": {
-            "psl": "^1.1.24",
-            "punycode": "^1.4.1"
-          }
-        },
-        "uuid": {
-          "version": "3.3.2",
-          "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-          "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
-          "dev": true
         }
       }
     },
@@ -2690,6 +2571,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -3632,7 +3514,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",
@@ -5010,12 +4893,6 @@
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
       "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM="
     },
-    "psl": {
-      "version": "1.1.29",
-      "resolved": "https://registry.npmjs.org/psl/-/psl-1.1.29.tgz",
-      "integrity": "sha512-AeUmQ0oLN02flVHXWh9sSJF7mcdFq0ppid/JkErufc3hGIV/AMa8Fo9VgDo/cT2jFdOWoFvHp90qqBH54W+gjQ==",
-      "dev": true
-    },
     "punycode": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",