Change defaultBranch default to main (#248)

* Change defaultBranch default to main

* Update .changeset/curly-mirrors-own.md

---------

Co-authored-by: Mateusz Burzyński <[email protected]>

Author: bluwy

.changeset/curly-mirrors-own.md

@@ -0,0 +1,5 @@
+---
+"@manypkg/cli": minor
+---
+
+Change the default value of the `defaultBranch` config from `"master"` to `"main"`

README.md

@@ -94,12 +94,12 @@ Manypkg supports a number of options. Options can be provided using the `manypkg
 
 ### `defaultBranch`
 
-Used by the [Incorrect `repository` field](#incorrect-repository-field) rule to determine the correct name for repositories. The default value is `master`.
+Used by the [Incorrect `repository` field](#incorrect-repository-field) rule to determine the correct name for repositories. The default value is `main`.
 
 ```json
 {
   "manypkg": {
-    "defaultBranch": "master"
+    "defaultBranch": "main"
   }
 }
 ```

packages/cli/src/index.ts

@@ -25,7 +25,7 @@ type PackagesWithConfig = Packages & {
 };
 
 let defaultOptions = {
-  defaultBranch: "master",
+  defaultBranch: "main",
 };
 
 let runChecks = (