Merge pull request #918 from cclauss/pyup-pin-twitter-1.19.6

Pin twitter to latest version 1.19.6

Author: cclauss

requirements.txt

@@ -54,7 +54,7 @@ sqlite3==2.6.0
 sympy==0.7.4.1
 thrift
 turtle
-twitter
+twitter==1.19.6
 wavebender==0.3
 werkzeug==0.9.4
 wsgiref