Update CONTRIBUTING.md

bethesque · web-flow · commit 1f19a0ee2fef · 2017-06-22T08:51:35.000+10:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -1,5 +1,7 @@
 # Raising issues
 
+_Before raising an issue, please ensure that you are using the latest version of pact-python._
+
 Please provide the following information with your issue to enable us to respond as quickly as possible.
 
 * The relevant versions of the packages you are using.
