Merge pull request #128 from saschanaz/versionkey-py3

Python 3: version_key() should return list

binaryen-tags.txt

@@ -38,4 +38,5 @@
 1.37.24
 1.37.25
 1.37.26
-1.37.27
+1.37.27
+1.37.28

emscripten-tags.txt

@@ -111,4 +111,5 @@
 1.37.24
 1.37.25
 1.37.26
-1.37.27
+1.37.27
+1.37.28

emsdk

@@ -1497,7 +1497,7 @@ def find_used_python():
   return None
 
 def version_key(ver):
-  return map(int, re.split('[._-]', ver))
+  return list(map(int, re.split('[._-]', ver)))
 
 # A sort function that is compatible with both Python 2 and Python 3 using a custom comparison function.
 def python_2_3_sorted(arr, cmp):