Merge pull request #13339 from singingwolfboy/update-pa11ycrawler

pa11ycrawler 1.3.0

requirements/edx/github.txt

@@ -69,7 +69,7 @@ git+https://github.com/edx/rfc6266.git@v0.0.5-edx#egg=rfc6266==0.0.5-edx
 
 # Used for testing
 git+https://github.com/edx/lettuce.git@0.2.20.002#egg=lettuce==0.2.20.002
-git+https://github.com/edx/pa11ycrawler.git@1.2.0#egg=pa11ycrawler==1.2.0
+git+https://github.com/edx/pa11ycrawler.git@1.3.0#egg=pa11ycrawler==1.3.0
 
 # Our libraries:
 git+https://github.com/edx/XBlock.git@xblock-0.4.12#egg=XBlock==0.4.12