Fix published executable (#42)

Executables — files that ship with packages that are meant to be
executed and which are specified via the `bin` field in `package.json` —
aren't automatically run through Node. The standard way to do this is to
add a hashbang line to the executable.

Since we are using TypeScript, and we have to go through a compilation
step before we publish the package, we have two options:

* Add `#!/usr/bin/env node` to the top of `src/cli.ts`
* Make a new file *not* written in TypeScript which will execute the
  compiled version of the CLI

The former seems confusing, because it's impossible to run a TypeScript
file through `node`, so we go with the latter.

Author: mcmire

bin/create-release-branch.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+/* eslint-disable-next-line import/no-unassigned-import */
+require('../dist/cli');

package.json

@@ -6,8 +6,9 @@
     "type": "git",
     "url": "https://github.com/MetaMask/create-release-branch.git"
   },
-  "bin": "dist/cli.js",
+  "bin": "bin/create-release-branch.js",
   "files": [
+    "bin/",
     "dist/"
   ],
   "scripts": {
@@ -17,7 +18,7 @@
     "lint:eslint": "eslint . --cache --ext js,ts",
     "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write",
     "lint:misc": "prettier '**/*.json' '**/*.md' '!CHANGELOG.md' '**/*.yml' '!.yarnrc.yml' --ignore-path .gitignore --no-error-on-unmatched-pattern",
-    "prepack": "yarn build:clean && chmod +x dist/cli.js && yarn lint && yarn test",
+    "prepack": "yarn lint && yarn build:clean && yarn test",
     "test": "jest && jest-it-up",
     "test:watch": "jest --watch"
   },

yarn.lock

@@ -909,7 +909,7 @@ __metadata:
     yaml: ^2.1.1
     yargs: ^17.5.1
   bin:
-    create-release-branch: dist/cli.js
+    create-release-branch: bin/create-release-branch.js
   languageName: unknown
   linkType: soft