Disable posting to Gitter

Author: pascalberger

recipe.cake

@@ -15,6 +15,7 @@ BuildParameters.SetParameters(
     repositoryName: "Cake.Issues.EsLint",
     appVeyorAccountName: "cakecontrib",
     shouldRunCoveralls: false, // Disabled because it's currently failing
+    shouldPostToGitter: false, // Disabled because it's currently failing
     shouldGenerateDocumentation: false);
 
 BuildParameters.PrintParameters(Context);