refactor(eslint): use cordova-eslint

[timbru31]

Ref apache/cordova#142
Ref apache/cordova#4

Depends on #120, therefor WIP

Platforms affected

Motivation and Context

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[erisu]

I see that there are two .eslintrc.yml files.

• <root>/.eslintrc.yml
• <root>/tests/.eslintrc.yml

You can consolidate them into one file.

• <root>/.eslintrc.yml

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

root: true
extends: '@cordova/eslint-config/browser'

overrides:
  - files: [tests/**/*.js]
    extends: '@cordova/eslint-config/node-tests'