Simplify prettier config (#2662)

.prettierignore

@@ -0,0 +1,13 @@
+# Copied from '.gitignore', please keep it in sync.
+.eslintcache
+node_modules
+coverage
+npmDist
+denoDist
+benchmarkDist
+integrationTmp
+npm
+deno
+
+# Don't touch GraphQL files.
+*.graphql

package.json

@@ -38,8 +38,8 @@
     "check:cover": "node resources/check-cover.js && nyc report --nycrc-path .nycflowrc.yml",
     "testonly": "mocha --full-trace src/**/__tests__/**/*-test.js",
     "testonly:cover": "nyc npm run testonly",
-    "prettier": "prettier --ignore-path .gitignore --write --list-different \"**/*.{js,ts,md,json,yml}\"",
-    "prettier:check": "prettier --ignore-path .gitignore --check \"**/*.{js,ts,md,json,yml}\"",
+    "prettier": "prettier --write --list-different .",
+    "prettier:check": "prettier --check .",
     "check:spelling": "cspell \"./{src/**/,resources/**/,integrationTests/**/}*.{js,ts,md,graphql}\"",
     "check:integrations": "mocha --full-trace integrationTests/*-test.js",
     "build:npm": "node resources/build-npm.js",