[ADF-5410] code fixes and updates prior to Angular 12 upgrade (#7177)

* package fixes

* upgrade stylelint config

* upgrade configuration and stats

* code fixes based on Angular upgrade

* rework scss-bundle usage

* use node 14 with travis (lts)

* fix production builds

* fix node sass version

lib/cli/tsconfig.json

@@ -2,6 +2,7 @@
   "compilerOptions": {
     "declaration": true,
     "module": "commonjs",
+    "declarationMap": true,
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noFallthroughCasesInSwitch": true,

lib/cli/tsconfig.lib.prod.json

@@ -1,6 +1,9 @@
 {
   "extends": "./tsconfig.lib.json",
+  "compilerOptions": {
+    "declarationMap": false
+  },
   "angularCompilerOptions": {
     "enableIvy": false
   }
-}
+}