Update pypom to 2.1.0 (#3914)

And remove the now fixed `filterwarnings` entry.

requirements/dev.txt

@@ -22,9 +22,9 @@ pytest-selenium==1.13.0 \
     --hash=sha256:afdaa6faf4db615af87e126d734bfa4a3c12ff6afb6f86138900603b55ff5230 \
     --hash=sha256:3b9191877ee61ff87bf705b8e2072b57be4872cfd5543a76b3a104a843b6c520
 
-PyPOM==2.0.0 \
-    --hash=sha256:ea1d3b0297fdeccc47d034a005e6cd16e206ad32258aeffbca47f0c516a63082 \
-    --hash=sha256:ece35948abcb65f4dc230bd7464323bc83e7c02d35aaaeea53fd728effc0df14
+PyPOM==2.1.0 \
+    --hash=sha256:32d30ca4f709c77718ec1c6749d47546d930a1aa0d5300b7ec18064c7ae7c750 \
+    --hash=sha256:d9a56b1678e00191ae59dc2504ffad6b2481aa337e90d1667c61c6449e6370c6
 
 # Required by django-extension's runserver_plus command.
 Werkzeug==0.14.1 \

setup.cfg

@@ -51,9 +51,6 @@ filterwarnings =
     ignore:sys.exc_clear\(\) not supported in 3.x; use except clauses:DeprecationWarning
     ignore:classic int division:DeprecationWarning:django.db.backends.base.schema
     ignore:In 3.x, reload\(\) is renamed to imp.reload\(\):DeprecationWarning:django.db.migrations.loader
-    # https://github.com/mozilla/PyPOM/issues/90
-    # (but attributed to pluggy.manager, due to https://github.com/pytest-dev/pluggy/issues/166)
-    ignore:Support for the `implprefix` arg is now deprecated:DeprecationWarning:pluggy.manager
     # https://github.com/pytest-dev/pytest-selenium/issues/179
     # (but attributed to selenium, due to https://github.com/SeleniumHQ/selenium/issues/6274)
     ignore:use service_log_path instead of log_path:DeprecationWarning:selenium.webdriver.firefox.webdriver