for #950, update babel to v7 (#1077)

* for #950, upgrade babel to v7

* fix linting errors

* for #950, remove @babel/core from devDependencies (so it's only in dependencies) and change babel-loader config to use .babelrc

* for #950, changes to .babelrc to make  work

* for #950, include core-js modules in webpack config for IE support with babel/plugin-syntax-dynamic-import

* for #950, update babel and associated packages to LTS

package-lock.json

@@ -13054,14 +13054,6 @@
         "passport-oauth2": "1.x.x"
       }
     },
-    "passport-http": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/passport-http/-/passport-http-0.3.0.tgz",
-      "integrity": "sha1-juU9Q4C+nGDfIVGSUCmCb3cRVgM=",
-      "requires": {
-        "passport-strategy": "1.x.x"
-      }
-    },
     "passport-local": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/passport-local/-/passport-local-1.0.0.tgz",