Bump version to 3.0.0rc1 (#11900)

CHANGELOG.md

@@ -3,6 +3,10 @@ Changelog
 
 All notable changes to this project will be documented in this file.
 
+## Unreleased
+
+TODO
+
 ## [2.9.3] - 2019-08-10
 ### Added
 

lib/mastodon/version.rb

@@ -5,19 +5,19 @@ module Mastodon
     module_function
 
     def major
-      2
-    end
-
-    def minor
-      9
-    end
-
-    def patch
       3
     end
 
+    def minor
+      0
+    end
+
+    def patch
+      0
+    end
+
     def flags
-      ''
+      'rc1'
     end
 
     def suffix