Fix version bumping script

Author: st0012

sentry-raven/.craft.yml

@@ -3,7 +3,7 @@ github:
     owner: getsentry
     repo: sentry-ruby
 changelogPolicy: simple
-preReleaseCommand: ruby ../.scripts/bump-version.rb
+preReleaseCommand: ruby .scripts/bump-version.rb
 releaseBranchPrefix: release-sentry-raven
 statusProvider:
   name: github

sentry-raven/.scripts/bump-version.rb

@@ -0,0 +1,5 @@
+file_name = "lib/raven/version.rb"
+
+text = File.read(file_name)
+new_contents = text.gsub(/VERSION = ".*"/, "VERSION = \"#{ARGV[1]}\"")
+File.open(file_name, "w") {|file| file.puts new_contents }