Bump requests from 2.21.0 to 2.22.0

Bumps [requests](https://github.com/requests/requests) from 2.21.0 to 2.22.0.
- [Release notes](https://github.com/requests/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](https://github.com/requests/requests/compare/v2.21.0...v2.22.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.in

@@ -1,5 +1,5 @@
 urllib3==1.24.3
-requests==2.21.0
+requests==2.22.0
 PyNaCl==1.3.0
 gevent==1.3.6
 Flask==1.1.1

requirements.txt

@@ -165,9 +165,9 @@ pynacl==1.3.0 \
     --hash=sha256:f67814c38162f4deb31f68d590771a29d5ae3b1bd64b75cf232308e5c74777e0
 pysocks==1.6.8 \
     --hash=sha256:3fe52c55890a248676fd69dc9e3c4e811718b777834bcaab7a8125cf9deac672
-requests==2.21.0 \
-    --hash=sha256:502a824f31acdacb3a35b6690b5fbf0bc41d63a24a45c4004352b0242707598e \
-    --hash=sha256:7bf2a778576d825600030a110f3c0e3e8edc51dfaafe1c146e39a2027784957b
+requests==2.22.0 \
+    --hash=sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4 \
+    --hash=sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31
 six==1.12.0 \
     --hash=sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c \
     --hash=sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73 \