feat(ci): add epic/* release workflow and rename master to trunk (#285)

Author: dkoo

.circleci/config.yml

@@ -21,7 +21,7 @@ workflows:
           filters:
             branches:
               only:
-                - master
+                - trunk
       - newspack/release:
           requires:
             - newspack/build
@@ -31,6 +31,7 @@ workflows:
                 - release
                 - alpha
                 - /^hotfix\/.*/
+                - /^epic\/.*/
       - newspack/post-release:
           requires:
             - newspack/release

PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,6 @@
 ### All Submissions:
 
-* [ ] Have you followed the [Newspack Contributing guideline](https://github.com/Automattic/newspack-plugin/blob/master/.github/CONTRIBUTING.md)?
+* [ ] Have you followed the [Newspack Contributing guideline](https://github.com/Automattic/newspack-plugin/blob/trunk/.github/CONTRIBUTING.md)?
 * [ ] Does your code follow the [WordPress' coding standards](https://make.wordpress.org/core/handbook/best-practices/coding-standards/) and [VIP Go coding standards](https://vip.wordpress.com/documentation/vip-go/code-review-blockers-warnings-notices/)?
 * [ ] Have you checked to ensure there aren't other open [Pull Requests](../../pulls) for the same update/change?
 

README.md

@@ -1,6 +1,6 @@
 # newspack-sponsors
 
-[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release) [![newspack-sponsors](https://circleci.com/gh/Automattic/newspack-sponsors/tree/master.svg?style=shield)](https://circleci.com/gh/Automattic/newspack-sponsors)
+[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release) [![newspack-sponsors](https://circleci.com/gh/Automattic/newspack-sponsors/tree/trunk.svg?style=shield)](https://circleci.com/gh/Automattic/newspack-sponsors)
 
 Create sponsors, edit sponsor info, and associate sponsors with posts, categories and tags. Allows special visual treatment for sponsored content.