Update 'problematic modules list' 

'Problematic modules' list now includes global
diff --git a/README.md b/README.md
index 5954efd..80f1e7b 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,7 @@
 * `os`
 * `crypto`
 * `compile`
+* `global`
 
 Also, a meck expectation set up for a function _f_ does not apply to the module-local invocation of _f_ within the mocked module.
 Consider the following module: