Release @google-cloud/security-center v0.1.1 (#28)

* Release v0.1.1

* Update CHANGELOG.md

Author: jkwlui

security-center/snippets/package.json

@@ -7,7 +7,7 @@
   },
   "license": "Apache-2.0",
   "dependencies": {
-    "@google-cloud/security-center": "^0.1.0"
+    "@google-cloud/security-center": "^0.1.1"
   },
   "devDependencies": {
     "mocha": "^5.2.0"