chore: release 0.3.0 (#50)

* updated CHANGELOG.md

* updated package.json

* updated samples/package.json

Author: jkwlui

talent/package.json

@@ -14,7 +14,9 @@
   "scripts": {
     "test": "mocha --timeout 600000"
   },
-  "dependencies": {},
+  "dependencies": {
+    "@google-cloud/talent": "^0.3.0"
+  },
   "devDependencies": {
     "chai": "^4.2.0",
     "mocha": "^6.0.0"