switching to eslint for code checking

most rules degraded to WARN, so we don't go insane. This will
change over time. The aim is to conform to a common style

Signed-off-by: Claudius Coenen <opensource@amenthes.de>

lib/models/index.js

@@ -25,6 +25,7 @@ if (config.dbURL) {
 // https://github.com/sequelize/sequelize/issues/6485
 function stripNullByte (value) {
   value = '' + value
+  // eslint-disable-next-line no-control-regex
   return value ? value.replace(/\u0000/g, '') : value
 }
 sequelize.stripNullByte = stripNullByte