Remove myself from *.gemspec

Remove myself as maintainer/author

Author: pascalwengerter

matestack-ui-core.gemspec

@@ -7,8 +7,8 @@ require "matestack/ui/core/version"
 Gem::Specification.new do |s|
   s.name        = "matestack-ui-core"
   s.version     = Matestack::Ui::Core::VERSION
-  s.authors     = ["Jonas Jabari", "Nils Henning", "Pascal Wengerter"]
-  s.email       = ["[email protected]", "[email protected]", "[email protected]"]
+  s.authors     = ["Jonas Jabari", "Nils Henning"]
+  s.email       = ["[email protected]", "[email protected]"]
   s.homepage    = "https://matestack.io"
   s.summary     = "Escape the frontend hustle & easily create interactive web apps in pure Ruby."
   s.description = "Matestack provides a collection of open source gems made for Ruby on Rails developers. Matestack enables you to craft interactive web UIs without JavaScript in pure Ruby with minimum effort. UI code becomes a native and fun part of your Rails app."