Update pypom from 1.3.0 to 2.0.0 (#3460)

requirements/dev.txt

@@ -22,9 +22,9 @@ pytest-selenium==1.12.0 \
     --hash=sha256:050a357a8bc9d38241052a277a5da3d67ff4801a807e8918113a88defee11c97 \
     --hash=sha256:b3c36a212d0b5a3ba61fccbf9f754aa2286840dc2ae910a04b67c72685a1bca7
 
-PyPOM==1.3.0 \
-    --hash=sha256:b2e1dec250d24b63fb66cb70822208085cbbbc975951ec23388b0484b9f3e86e \
-    --hash=sha256:a39f7d3401315c0e3a505c72e2b173e3d4dcf453bfab0f8fba374b99063bccdf
+PyPOM==2.0.0 \
+    --hash=sha256:ea1d3b0297fdeccc47d034a005e6cd16e206ad32258aeffbca47f0c516a63082 \
+    --hash=sha256:ece35948abcb65f4dc230bd7464323bc83e7c02d35aaaeea53fd728effc0df14
 
 # Required by django-extension's runserver_plus command.
 Werkzeug==0.14.1 \