Fix a crash on exit in Nuke 11

Author: mathurf

core/core_api.yml

@@ -14,4 +14,4 @@
 location:
   type: app_store
   name: tk-core
-  version: v0.18.101
+  version: v0.18.64

env/includes/common/engines.yml

@@ -33,7 +33,7 @@ common.engines.tk-maya.location:
 common.engines.tk-nuke.location:
     type: app_store
     name: tk-nuke
-    version: v0.8.1
+    version: v0.8.2
 
 # Photoshop
 common.engines.tk-photoshopcc.location: