Added templates and slack

[juwara0]

This project uses semver, please check the scope of this pr:

• [ ] #none# - documentation fixes and/or test additions
• [X] #patch# - backwards-compatible bug fix
• [ ] #minor# - adding functionality in a backwards-compatible manner
• [ ] #major# - incompatible API change

Closes: https://agile-jira.ciena.com/browse/FROST-1274 and https://agile-jira.ciena.com/browse/FROST-1314

CHANGELOG

• Updated pull request template
• Added issue template
• Updated to pr-bumper version 3
• Updated to node 8
• Added slack integration
• Updated eslint-config-frost-standard to ^9.0.1
• Updated package-lock.json file

[notmessenger]

👍