Add github action for merging main branch

.github/workflows/sync-main.yaml

@@ -0,0 +1,18 @@
+name: Merge main into master
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  sync:
+    name: Merge main branch
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with: {fetch-depth: 0}
+    - name: merge
+      run: |
+        git checkout master
+        git merge --ff-only main
+        git push origin master

CONTRIBUTING.md

@@ -10,21 +10,3 @@ explaining the feature and why it is necessary.
 
 Pull requests for bug fixes are always appreciated. They should almost always
 include a test which fails without the bug fix.
-
-## Dependencies
-
-At this time both a `Gopkg.toml` for `dep` and `go.mod` for go modules exist in
-the repo. The `Gopkg.toml` remains so that projects using earlier versions of Go
-are able to find compatible versions of dependencies.
-
-If you need to make a change to a dependency:
-
-1. Update `Gopkg.toml`.
-2. Run the following to sync the changes to `go.mod`.
-   ```
-   dep ensure
-   rm go.mod go.sum
-   go mod init
-   gotestsum
-   go mod tidy
-   ```

README.md

@@ -3,7 +3,7 @@
 A collection of packages to augment `testing` and support common patterns.
 
 [![GoDoc](https://godoc.org/gotest.tools?status.svg)](https://pkg.go.dev/gotest.tools/v3/?tab=subdirectories)
-[![CircleCI](https://circleci.com/gh/gotestyourself/gotest.tools/tree/master.svg?style=shield)](https://circleci.com/gh/gotestyourself/gotest.tools/tree/master)
+[![CircleCI](https://circleci.com/gh/gotestyourself/gotest.tools/tree/main.svg?style=shield)](https://circleci.com/gh/gotestyourself/gotest.tools/tree/main)
 [![Go Reportcard](https://goreportcard.com/badge/gotest.tools)](https://goreportcard.com/report/gotest.tools)
 
 ## Usage