build: update lint rules for schematics

npm/ng-packs/packages/schematics/tslint.json

@@ -1,6 +1,11 @@
 {
   "extends": "../../tslint.json",
+  "linterOptions": {
+    "exclude": ["**/utils/angular/**/*"]
+  },
   "rules": {
+    "no-non-null-assertion": false,
+    "no-string-literal": false,
     "variable-name": {
       "options": ["allow-leading-underscore", "ban-keywords", "check-format", "allow-pascal-case"]
     }