Eslint and Github actions workflows migration

[Shreyas-vgr]

Eslint and Github actions workflows migration.

Description

Migration of tslint -> eslint and lint fixes and updating packages.json with consistent build/test scripts and along with removal of gulp dependency. Made the changes on the following packages.

• ask-sdk
• ask-sdk-v1adapter
• ask-sdk-express-adapter
• ask-smapi-sdk

Testing

Tested by firing workflows actions and builds success (Checks tab)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Docs(Add new document content)
• [ ] Translate Docs(Translate document content)

Checklist

• [x] My code follows the code style of this project
• [ ] My change requires a change to the documentation
• [ ] I have updated the documentation accordingly
• [x] I have read the README document
• [ ] I have added tests to cover my changes
• [x] All new and existing tests passed
• [x] My commit message follows Conventional Commit Guideline

License

• [x] I confirm that this pull request can be released under the Apache 2 license