Fix references to default branch to use main.

Author: reedr3

.github/workflows/test.yml

@@ -3,7 +3,7 @@ name: "Unit Tests"
 on:
   pull_request:
     branches:
-    - master
+    - main
 permissions:
   contents: write
 

.travis.yml

@@ -7,4 +7,4 @@ install:
 script: BINARY_VALIDATION=true bin/test --compilers=2
 branches:
   only:
-  - master
+  - main

README.md

@@ -1,4 +1,4 @@
-# Cloud Foundry CLI Plugin Repository (CLIPR)[![Build Status](https://travis-ci.org/cloudfoundry/cli-plugin-repo.svg?branch=master)](https://travis-ci.org/cloudfoundry/cli-plugin-repo)
+# Cloud Foundry CLI Plugin Repository (CLIPR)[![Build Status](https://travis-ci.org/cloudfoundry/cli-plugin-repo.svg?branch=main)](https://travis-ci.org/cloudfoundry/cli-plugin-repo)
 
 Plugin Downloads Server Uptime
 
@@ -143,4 +143,4 @@ This process can get a little tedious if you do it manually every time, that's w
 
 ## Running your own Plugin Repo Server
 
-Included as part of this repository is the CLI Plugin Repo (CLIPR), a reference implementation of a repo server. For information on how to run CLIPR or how to write your own, [please see the CLIPR documentation here.](https://github.com/cloudfoundry/cli-plugin-repo/blob/master/docs/CLIPR.md)
+Included as part of this repository is the CLI Plugin Repo (CLIPR), a reference implementation of a repo server. For information on how to run CLIPR or how to write your own, [please see the CLIPR documentation here.](https://github.com/cloudfoundry/cli-plugin-repo/blob/main/docs/CLIPR.md)

docs/CLIPR.md

@@ -64,12 +64,12 @@ Alternatively, you can create your own plugin repo implementation. The server mu
     "binaries": [
       {
         "platform":"osx",
-        "url":"https://github.com/johndoe/plugin-repo/raw/master/bin/osx/echo",
+        "url":"https://github.com/johndoe/plugin-repo/raw/main/bin/osx/echo",
         "checksum":"2a087d5cddcfb057fbda91e611c33f46"
       },
       {
         "platform":"win64",
-        "url":"https://github.com/johndoe/plugin-repo/raw/master/bin/windows64/echo.exe",
+        "url":"https://github.com/johndoe/plugin-repo/raw/main/bin/windows64/echo.exe",
         "checksum":"b4550d6594a3358563b9dcb81e40fd66"
       }
     ]