Update the master branch to 1.2.0-beta

Author: sharwell

StyleCop.Analyzers/version.json

@@ -1,8 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "1.1.1-beta.{height}",
-  // The build number offset accounts for the delay in adopting Nerdbank.GitVersioning
-  "buildNumberOffset": 40,
+  "version": "1.2.0-beta.{height}",
   "assemblyVersion": {
     "precision": "revision"
   },