diff --git a/package-lock.json b/package-lock.json
index 7a8be97..49cd027 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -159,6 +159,21 @@
         "to-fast-properties": "^2.0.0"
       }
     },
+    "@types/babel-types": {
+      "version": "7.0.7",
+      "resolved": "https://registry.npmjs.org/@types/babel-types/-/babel-types-7.0.7.tgz",
+      "integrity": "sha512-dBtBbrc+qTHy1WdfHYjBwRln4+LWqASWakLHsWHR2NWHIFkv4W3O070IGoGLEBrJBvct3r0L1BUPuvURi7kYUQ==",
+      "dev": true
+    },
+    "@types/babylon": {
+      "version": "6.16.5",
+      "resolved": "https://registry.npmjs.org/@types/babylon/-/babylon-6.16.5.tgz",
+      "integrity": "sha512-xH2e58elpj1X4ynnKp9qSnWlsRTIs6n3tgLGNfwAGHwePw0mulHQllV34n0T25uYSu1k0hRKkWXF890B1yS47w==",
+      "dev": true,
+      "requires": {
+        "@types/babel-types": "*"
+      }
+    },
     "accepts": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
@@ -169,12 +184,6 @@
         "negotiator": "0.6.1"
       }
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-    "acorn": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
-      "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
-      "dev": true
-    },
     "ajv": {
       "version": "6.7.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.7.0.tgz",
@@ -334,6 +343,42 @@
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       "dev": true
     },
+    "babel-runtime": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "dev": true,
+      "requires": {
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.11.0"
+      }
+    },
+    "babel-types": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-types/-/babel-types-6.26.0.tgz",
+      "integrity": "sha1-o7Bz+Uq0nrb6Vc1lInozQ4BjJJc=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "^6.26.0",
+        "esutils": "^2.0.2",
+        "lodash": "^4.17.4",
+        "to-fast-properties": "^1.0.3"
+      },
+      "dependencies": {
+        "to-fast-properties": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-1.0.3.tgz",
+          "integrity": "sha1-uDVx+k2MJbguIxsG46MFXeTKGkc=",
+          "dev": true
+        }
+      }
+    },
+    "babylon": {
+      "version": "6.18.0",
+      "resolved": "https://registry.npmjs.org/babylon/-/babylon-6.18.0.tgz",
+      "integrity": "sha512-q/UEjfGJ2Cm3oKV71DJz9d25TPnq5rhBVL2Q4fA5wcC3jcrdn7+SssEybFIxwAvvP+YCsCYNKughoF33GxgycQ==",
+      "dev": true
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -593,12 +638,15 @@
       "dev": true
     },
     "constantinople": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/constantinople/-/constantinople-3.0.2.tgz",
-      "integrity": "sha1-S5RdmTeQe82Y7ldRIsOBdRZUQUE=",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/constantinople/-/constantinople-3.1.2.tgz",
+      "integrity": "sha512-yePcBqEFhLOqSBtwYOGGS1exHo/s1xjekXiinh4itpNQGCu4KA1euPh1fg07N2wMITZXQkBz75Ntdt1ctGZouw==",
       "dev": true,
       "requires": {
-        "acorn": "^2.1.0"
+        "@types/babel-types": "^7.0.0",
+        "@types/babylon": "^6.16.2",
+        "babel-types": "^6.26.0",
+        "babylon": "^6.18.0"
       }
     },
     "content-disposition": {
@@ -644,6 +692,12 @@
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw=",
       "dev": true
     },
+    "core-js": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.9.tgz",
+      "integrity": "sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A==",
+      "dev": true
+    },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -3032,6 +3086,12 @@
         "read-pkg": "^3.0.0"
       }
     },
+    "regenerator-runtime": {
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+      "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
+      "dev": true
+    },
     "release-zalgo": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/release-zalgo/-/release-zalgo-1.0.0.tgz",