Drop IE11 Support (#476)

package.json

@@ -44,9 +44,7 @@
     "@types/node-fetch": "2.5.7",
     "@uifabric/react-cards": "0.109.110",
     "@uifabric/styling": "7.13.7",
-    "abort-controller": "3.0.0",
     "applicationinsights": "1.8.0",
-    "babel-polyfill": "6.26.0",
     "bootstrap": "3.4.1",
     "canvas": "file:./canvas",
     "clean-webpack-plugin": "0.1.19",
@@ -60,8 +58,6 @@
     "date-fns": "1.29.0",
     "dayjs": "1.8.19",
     "dotenv": "8.2.0",
-    "es6-object-assign": "1.1.0",
-    "es6-symbol": "3.1.3",
     "eslint-plugin-jest": "23.13.2",
     "eslint-plugin-react": "7.20.0",
     "hasher": "1.2.0",
@@ -79,12 +75,9 @@
     "monaco-editor": "0.18.1",
     "ms": "2.1.3",
     "msal": "1.4.4",
-    "object.entries": "1.1.0",
     "office-ui-fabric-react": "7.164.2",
     "p-retry": "4.2.0",
     "plotly.js-cartesian-dist-min": "1.52.3",
-    "promise-polyfill": "8.1.0",
-    "promise.prototype.finally": "3.1.0",
     "q": "1.5.1",
     "react": "16.13.1",
     "react-animate-height": "2.0.8",
@@ -101,13 +94,9 @@
     "rxjs": "6.6.3",
     "styled-components": "4.3.2",
     "swr": "0.4.0",
-    "text-encoding": "0.7.0",
+    "terser-webpack-plugin": "3.1.0",
     "underscore": "1.9.1",
-    "url-polyfill": "1.1.7",
-    "utility-types": "3.10.0",
-    "webcrypto-liner": "1.1.4",
-    "webfontloader": "1.6.28",
-    "whatwg-fetch": "3.0.0"
+    "utility-types": "3.10.0"
   },
   "devDependencies": {
     "@babel/core": "7.9.0",
@@ -137,9 +126,7 @@
     "@types/react-redux": "7.1.7",
     "@types/sinon": "2.3.3",
     "@types/styled-components": "5.1.1",
-    "@types/text-encoding": "0.0.33",
     "@types/underscore": "1.7.36",
-    "@types/webfontloader": "1.6.29",
     "@typescript-eslint/eslint-plugin": "4.0.1",
     "@typescript-eslint/parser": "4.0.1",
     "axe-puppeteer": "1.1.0",
@@ -181,7 +168,6 @@
     "rimraf": "3.0.0",
     "sinon": "3.2.1",
     "style-loader": "0.23.0",
-    "terser-webpack-plugin": "3.0.5",
     "ts-loader": "6.2.2",
     "tslint": "5.11.0",
     "tslint-microsoft-contrib": "6.0.0",
@@ -238,4 +224,4 @@
   "prettier": {
     "printWidth": 120
   }
-}
+}