fix: buffer deprecation warning

Author: jdx

scripts/github_token.js

@@ -13,7 +13,7 @@ const env = k => {
 
 const token = jwt.sign(
   {},
-  new Buffer(env('GITHUB_APP_PEM'), 'base64').toString('utf8'), {
+  Buffer.from(env('GITHUB_APP_PEM'), 'base64').toString('utf8'), {
   issuer: env('GITHUB_APP_ID'),
   algorithm: 'RS256',
   expiresIn: '10m'