fix: typings entry point and failing definitions (angular-redux#36)

Also adds stricter ngc build rules to ensure correct metadata emit.

Author: smithad15

packages/form/package.json

@@ -69,6 +69,7 @@
     "prepublish": "npm run build"
   },
   "main": "dist/source/index.js",
+  "typings": "dist/source/index.d.ts",
   "repository": "https://github.com/angular-redux/form",
   "license": "MIT"
 }

packages/form/source/connect-array.ts

@@ -111,11 +111,11 @@ export class ConnectArray extends ControlContainer implements OnInit {
     return controlPath(this.key, this.parent);
   }
 
-  get validator(): ValidatorFn {
+  get validator(): ValidatorFn | null {
     return Validators.compose(this.rawValidators);
   }
 
-  get asyncValidator(): AsyncValidatorFn {
+  get asyncValidator(): AsyncValidatorFn | null {
     return Validators.composeAsync(this.rawAsyncValidators);
   }
 

packages/form/source/shims.ts

@@ -10,7 +10,7 @@ import {
 } from '@angular/forms';
 
 export function controlPath(name: string, parent: ControlContainer): string[] {
-  return [...parent.path, name];
+  return [...(parent.path || []), name];
 }
 
 export function selectValueAccessor(

packages/form/tsconfig.json

@@ -26,7 +26,10 @@
     "useBabel": true,
     "useCache": false
   },
-  "angularCompilerOptions": {},
+  "angularCompilerOptions": {
+    "strictMetadataEmit": true,
+    "skipTemplateCodegen": true
+  },
   "exclude": [
     "node_modules",
     "dist",