chore: run unit tests when preparing the package

Author: rosen-vladimirov

Diff for: package.json

@@ -60,7 +60,7 @@
   "scripts": {
     "postinstall": "node postinstall.js",
     "postpack": "rm -rf node_modules",
-    "prepare": "tsc",
+    "prepare": "tsc && npm run jasmine",
     "test": "npm run prepare && npm run jasmine",
     "jasmine": "jasmine --config=jasmine-config/jasmine.json",
     "version": "rm package-lock.json && conventional-changelog -p angular -i CHANGELOG.md -s && git add CHANGELOG.md"