Babel should not silently remove unknown options after command… (#10698)

* chore: add test case

* chore: bump commander to 4.0.1

* fix: let commander.js throw on unknown options after args

packages/babel-cli/src/babel/options.js

@@ -163,6 +163,10 @@ commander.option(
 
 commander.version(pkg.version + " (@babel/core " + version + ")");
 commander.usage("[options] <files ...>");
+// register an empty action handler so that commander.js can throw on
+// unknown options _after_ args
+// see https://github.com/tj/commander.js/issues/561#issuecomment-522209408
+commander.action(() => {});
 
 export type CmdOptions = {
   babelOptions: Object,