Bumped version to 20.06

Author: pmeenan

internal/webpagetest.py

@@ -127,7 +127,7 @@ def __init__(self, options, workdir):
                 pass
         # If we are running in a git clone, grab the date of the last
         # commit as the version
-        self.version = '20.05'
+        self.version = '20.06'
         try:
             directory = os.path.abspath(os.path.dirname(__file__))
             if (sys.version_info >= (3, 0)):