Fix comping regex to support Kotlin escapes

Fixes gh-26

Author: philwebb

lib/code-chomping-extension.js

@@ -12,7 +12,7 @@ const JAVA_LIKE = ['groovy', 'java', 'kotlin']
 const ChompDirRx = /\/\/ @chomp:(file|line)$/
 const ChompAndReplaceDirRx = /^(.+?)\/\*(?: @chomp:line (.+?) )?\*\/ ?\S/
 const FormatterDirRx = /\/\/ @formatter:(?:on|off)$/
-const PackageDeclRx = /^package (?:[a-z][a-z0-9]*(?:[.][a-z][a-z0-9]*)*)(;|)$/
+const PackageDeclRx = /^package (?:[a-z`][a-z0-9`]*(?:[.][a-z`][a-z0-9`]*)*)(;|)$/
 const SuppressAnnotRx = /@Suppress(?:Warnings)?\(.+?\)$/
 
 function register (registry) {

test/code-chomping-extension-test.js

@@ -127,7 +127,7 @@ describe('code-chomping-extension', () => {
        * Copyright 2000-present ACME Corp. Free the source!
        */
 
-      package org.example
+      package org.example.\`object\`
 
       public class Example {}
       `