Pin twine to latest version 1.12.1 (#52)

pyup-bot · Revolution1 · commit f2bf2b8d9a60 · 2019-02-12T17:01:41.000+08:00
diff --git a/requirements_dev.txt b/requirements_dev.txt
@@ -18,4 +18,4 @@ yapf>=0.20.0
 m2r==0.2.1
 codecov>=1.4.0
 codacy-coverage==1.3.11
-twine
+twine==1.12.1
