add prebuild and postgrammar scripts (markdoc#37)

Author: mfix-stripe

build.js

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 const { buildSync } = require('esbuild');
 
 const shared = {

package.json

@@ -17,11 +17,13 @@
   "scripts": {
     "test": "node -r ts-eager/register ./node_modules/.bin/jasmine",
     "marktest": "node -r ts-eager/register ${INSPECT:+--inspect-brk} spec/marktest/index.ts spec/marktest/tests.yaml",
-    "build": "npx patch-package && npm run build:common && npm run build:types",
+    "prebuild": "npx patch-package",
+    "build": "npm run build:common && npm run build:types",
     "build:common": "node build.js",
     "build:types": "tsc --emitDeclarationOnly --outDir dist",
     "lint": "eslint .",
-    "grammar": "pegjs -o src/grammar/tag.js src/grammar/tag.pegjs && prettier --write src/grammar/tag.js",
+    "grammar": "pegjs -o src/grammar/tag.js src/grammar/tag.pegjs",
+    "postgrammar": "prettier --write src/grammar/tag.js",
     "prettier": "prettier --write index.ts src spec",
     "prettier:check": "prettier --check index.ts src spec",
     "type:check": "tsc --noEmit",