build(deps): bump treq from 21.1.0 to 22.1.0 in /requirements

Bumps [treq](https://github.com/twisted/treq) from 21.1.0 to 22.1.0.
- [Release notes](https://github.com/twisted/treq/releases)
- [Changelog](https://github.com/twisted/treq/blob/master/CHANGELOG.rst)
- [Commits](twisted/treq@release-21.1.0...release-22.1.0)

---
updated-dependencies:
- dependency-name: treq
  dependency-type: indirect
...

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

requirements/requirements-ci.txt

@@ -696,7 +696,6 @@ six==1.16.0
     #   responses
     #   thrift
     #   traitlets
-    #   treq
 sortedcontainers==2.1.0
     # via
     #   -r requirements-dev.txt
@@ -741,7 +740,7 @@ traitlets==4.3.2
     #   -r requirements-dev.txt
     #   ipython
     #   matplotlib-inline
-treq==21.1.0
+treq==22.1.0
     # via
     #   -r requirements-dev.txt
     #   matrix-synapse

requirements/requirements-dev.txt

@@ -600,7 +600,6 @@ six==1.16.0
     #   responses
     #   thrift
     #   traitlets
-    #   treq
 sortedcontainers==2.1.0
     # via
     #   hypothesis
@@ -639,7 +638,7 @@ traitlets==4.3.2
     # via
     #   ipython
     #   matplotlib-inline
-treq==21.1.0
+treq==22.1.0
     # via matrix-synapse
 twisted[tls]==21.2.0
     # via