fix(@schematics/angular): add tslib as a direct dependency for new libraries

Tslib version is bound to the TypeScript version used to comopile the library. Thus, we shouldn't list`tslib` as a  `peerDependencies`. This is because, a user can install libraries which have been compiled with older versions of TypeScript and thus require multiple `tslib` versions to be installed.

Reference: TOOL-1374

Author: alan-agius4

packages/schematics/angular/library/files/package.json.template

@@ -3,7 +3,9 @@
   "version": "0.0.1",
   "peerDependencies": {
     "@angular/common": "^<%= angularLatestVersion %>",
-    "@angular/core": "^<%= angularLatestVersion %>",
+    "@angular/core": "^<%= angularLatestVersion %>"
+  },
+  "dependencies": {
     "tslib": "^<%= tsLibLatestVersion %>"
   }
 }