get branch consistent in badges

Author: mileslucas

.github/workflows/CompatHelper.yml

@@ -9,8 +9,8 @@ jobs:
     steps:
       - name: Pkg.add("CompatHelper")
         run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
-      - name: CompatHelper.main()
+      - name: CompatHelper.master()
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-        run: julia -e 'using CompatHelper; CompatHelper.main()'
+        run: julia -e 'using CompatHelper; CompatHelper.master()'

README.md

@@ -1,9 +1,9 @@
 WCS.jl
 ======
 
-[![Build Status](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml?query=branch%3Amain)
+[![Build Status](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml/badge.svg?branch=master)](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml?query=branch%3Amaster)
 [![PkgEval](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/W/WCS.svg)](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/report.html)
-[![Coverage](https://codecov.io/gh/JuliaAstro/WCS.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/JuliaAstro/WCS.jl)
+[![Coverage](https://codecov.io/gh/JuliaAstro/WCS.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaAstro/WCS.jl)
 [![License](https://img.shields.io/github/license/JuliaAstro/WCS.jl?color=yellow)](LICENSE)
 
 [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaAstro.github.io/WCS.jl/stable)

docs/src/index.md

@@ -1,9 +1,9 @@
 # WCS.jl
 
 [![Code](https://img.shields.io/badge/Code-GitHub-black.svg)](https://github.com/JuliaAstro/WCS.jl)
-[![Build Status](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml?query=branch%3Amain)
+[![Build Status](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml/badge.svg?branch=master)](https://github.com/JuliaAstro/WCS.jl/actions/workflows/CI.yml?query=branch%3Amaster)
 [![PkgEval](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/W/WCS.svg)](https://juliaci.github.io/NanosoldierReports/pkgeval_badges/report.html)
-[![Coverage](https://codecov.io/gh/JuliaAstro/WCS.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/JuliaAstro/WCS.jl)
+[![Coverage](https://codecov.io/gh/JuliaAstro/WCS.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaAstro/WCS.jl)
 [![License](https://img.shields.io/github/license/JuliaAstro/WCS.jl?color=yellow)](https://github.com/JuliaAstro/WCS.jl/blob/master/LICENSE)
 
 Astronomical [World Coordinate System](http://www.atnf.csiro.au/people/mcalabre/WCS/) library for Julia. This package wraps