chore: add prettier configuration

.prettierignore

@@ -0,0 +1 @@
+test/fixtures/**/*

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "arrowParens": "always",
+  "trailingComma": "all",
+  "singleQuote": true,
+  "htmlWhitespaceSensitivity": "ignore"
+}

package.json

@@ -25,11 +25,14 @@
     "build": "tsc",
     "build-watch": "tsc -w",
     "find-circular": "npm run build && madge --circular ./dist",
+    "format": "prettier --write '{src,test,scripts}/**/*.{js,ts}'",
     "prepare": "npm run build",
     "tap": "tap test/*.test.* test/acceptance/*.test.* test/system/*.test.* -Rspec --timeout=300 --node-arg=-r --node-arg=ts-node/register",
     "test": "npm run test-common && npm run tap",
     "test-common": "npm run check-tests && npm run build && npm run lint && node --require ts-node/register src/cli test --org=snyk",
-    "lint": "eslint --color --cache 'src/**/*.{js,ts}'",
+    "lint": "run-p --aggregate-output lint:*",
+    "lint:js": "eslint --color --cache 'src/**/*.{js,ts}'",
+    "lint:formatting": "prettier --check '{src,test,scripts}/**/*.{js,ts}'",
     "check-tests": "! grep 'test\\.only' test/*.test.js -n",
     "snyk-auth": "node --require ts-node/register src/cli auth $SNYK_API_KEY",
     "snyk-auth-windows": "node --require ts-node/register src/cli auth %SNYK_API_KEY%"
@@ -106,6 +109,7 @@
     "eslint-config-prettier": "^6.1.0",
     "madge": "^3.4.4",
     "nock": "^10.0.6",
+    "npm-run-all": "^4.1.5",
     "prettier": "^1.18.2",
     "proxyquire": "^1.7.4",
     "restify": "^4.1.1",