Add npm version configuration

.npmrc

@@ -0,0 +1 @@
+message = "Bump version to %s"

package.json

@@ -144,6 +144,8 @@
     "test": "grunt test",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
+    "preversion": "npm test",
+    "postversion": "git push origin master --follow-tags",
     "update-internal-deps": "rm -rf node_modules && npm install --production --no-shrinkwrap && npm dedupe && npm prune && npm shrinkwrap && npm run fix-shrinkwrap-protocol && npm install",
     "branch-files": "node lib/build/branchFiles/branchFiles.js",
     "affected_specs": "node lib/build/branchFiles/branchFiles.js | xargs node lib/build/affectedFiles/affectedFiles.js",