Prepare 0.12.0 release (#448)

Author: runningcode

doctor-plugin/build.gradle.kts

@@ -12,7 +12,7 @@ plugins {
 }
 
 group = "com.osacky.doctor"
-version = "0.11.1-SNAPSHOT"
+version = "0.12.0"
 
 repositories {
     mavenCentral()

mkdocs.yml

@@ -4,8 +4,8 @@
 
 extra:
   doctor:
-    current_release: '0.11.0'
-    next_release: '0.11.1'
+    current_release: '0.12.0'
+    next_release: '0.12.1'
 
 site_name: Gradle Doctor
 site_url: https://runningcode.github.io/gradle-doctor/