Adjust pyup.yml to also "find" requirements-dev

.pyup.yml

@@ -1,4 +1,32 @@
 # autogenerated pyup.io config file
 # see https://pyup.io/docs/configuration/ for all available options
 
-schedule: every day
+# configure updates globally
+# default: all
+# allowed: all, insecure, False
+update: all
+
+# configure dependency pinning globally
+# default: True
+# allowed: True, False
+pin: True
+
+schedule: "every day"
+
+
+search: False
+# Specify requirement files by hand, default is empty
+# default: empty
+# allowed: list
+requirements:
+  - requirements.txt
+  - requirements-dev.txt
+
+
+# configure the branch prefix the bot is using
+# default: pyup-
+branch_prefix: pyup/
+
+# allow to close stale PRs
+# default: True
+close_prs: True