Add release script to package.json

Author: nene

CONTRIBUTING.md

@@ -16,7 +16,7 @@ Tests that apply to all languages should be in `behavesLikeSqlFormatter.ts`.
 
 For those who have admin access on the repo, the new release publish flow is as such:
 
-- `release-it` (bumps version, git tag, git release, npm release)
+- `yarn release` (bumps version, git tag, git release, npm release)
 - `git subtree push --prefix static origin gh-pages` (pushes demo page to GH pages)
 
 ## Contributors

package.json

@@ -78,7 +78,8 @@
     "build:commonjs": "babel src --out-dir lib --extensions .ts --source-maps && tsc --module commonjs --emitDeclarationOnly --isolatedModules",
     "build:umd": "webpack --config webpack.dev.js",
     "build:umd:min": "webpack --config webpack.prod.js",
-    "build": "yarn build:commonjs && yarn build:umd && yarn build:umd:min"
+    "build": "yarn build:commonjs && yarn build:umd && yarn build:umd:min",
+    "release": "release-it"
   },
   "pre-push": [
     "ts:check",