Fix remaining main branch naming changes (#57)

Author: mattmook

.github/workflows/gradle-wrapper-validation.yml

@@ -3,17 +3,17 @@ name: "Validate Gradle Wrapper"
 on:
   push:
     branches:
-    - master
+    - main
     tags:
     - '*'
   pull_request:
     branches:
-    - master
+    - main
 
 jobs:
   validation:
     name: "Validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: actions/checkout@v2.3.1
+      - uses: gradle/wrapper-validation-action@v1.0.3

README.adoc

@@ -14,7 +14,7 @@ endif::[]
 
 https://bintray.com/appmattus/maven/fixture/_latestVersion[image:https://api.bintray.com/packages/appmattus/maven/fixture/images/download.svg[Download]]
 https://github.com/appmattus/kotlinfixture/actions[image:https://github.com/appmattus/kotlinfixture/workflows/CI/badge.svg[CI status]]
-https://codecov.io/gh/appmattus/kotlinfixture[image:https://codecov.io/gh/appmattus/kotlinfixture/branch/master/graph/badge.svg[Coverage status]]
+https://codecov.io/gh/appmattus/kotlinfixture[image:https://codecov.io/gh/appmattus/kotlinfixture/branch/main/graph/badge.svg[Coverage status]]
 link:LICENSE.md[image:https://img.shields.io/badge/License-Apache%202.0-blue.svg[License]]
 
 A tool to generate well-defined, but essentially random, input following the