Update versions.

Author: rickbeerendonk

package.json

@@ -25,21 +25,21 @@
     "serve": "11.2.0"
   },
   "devDependencies": {
-    "@babel/cli": "7.7.5",
-    "@babel/core": "7.7.5",
+    "@babel/cli": "7.7.7",
+    "@babel/core": "7.7.7",
     "@babel/plugin-proposal-class-properties": "7.7.4",
     "@babel/plugin-proposal-nullish-coalescing-operator": "7.7.4",
     "@babel/plugin-proposal-numeric-separator": "7.7.4",
     "@babel/plugin-proposal-optional-chaining": "7.7.5",
-    "@babel/plugin-proposal-pipeline-operator": "7.7.4",
+    "@babel/plugin-proposal-pipeline-operator": "7.7.7",
     "@babel/plugin-proposal-private-methods": "7.7.4",
     "@babel/plugin-syntax-bigint": "7.7.4",
     "@babel/plugin-syntax-dynamic-import": "7.7.4",
-    "@babel/preset-env": "7.7.6",
+    "@babel/preset-env": "7.7.7",
     "babel-eslint": "10.0.3",
     "babel-plugin-transform-optional-catch-binding": "7.0.0-alpha.16",
-    "core-js": "3.4.8",
-    "eslint": "6.7.2",
+    "core-js": "3.6.1",
+    "eslint": "6.8.0",
     "http-server": "0.12.0",
     "husky": "3.1.0",
     "prettier": "1.19.1",