chore(test): add taskkill on windows

Author: YOU54F

spec/integration_with_provider_state_in_headers_spec.rb

@@ -18,6 +18,10 @@
   end
 
   after(:all) do
-    Process.kill 'KILL', @pipe.pid
+    if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
+      system("taskkill /im #{@pipe.pid}  /f /t >nul 2>&1")
+    else
+      Process.kill 'KILL', @pipe.pid
+    end
   end
 end

spec/integration_with_provider_state_in_path.spec.rb

@@ -18,6 +18,10 @@
   end
 
   after(:all) do
-    Process.kill 'KILL', @pipe.pid
+    if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
+      system("taskkill /im #{@pipe.pid}  /f /t >nul 2>&1")
+    else
+      Process.kill 'KILL', @pipe.pid
+    end
   end
 end