Bump basket-client from 1.1.0 to 1.2.0 in /requirements

Bumps [basket-client](https://github.com/mozilla/basket-client) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/mozilla/basket-client/releases)
- [Commits](mozilla/basket-client@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: basket-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/prod.txt

@@ -780,9 +780,9 @@ requests-hawk==1.2.1 \
 mohawk==1.1.0 \
     --hash=sha256:3ed296a30453d0b724679e0fd41e4e940497f8e461a9a9c3b7f36e43bab0fa09 \
     --hash=sha256:d2a0e3ab10a209cc79e95e28f2dd54bd4a73fd1998ffe27b7ba0f962b6be9723
-basket-client==1.1.0 \
-    --hash=sha256:3e637824891cc7ff5262d3d57dc744c265becb295edfbec30223262e5544228d \
-    --hash=sha256:6477d29337d4a3a8843d88e25f679a348c8a26341370c508173548da9799c19d
+basket-client==1.2.0 \
+    --hash=sha256:09a79dc788ab6799bcbeacd03c604ed64abe080a981515781dc3a100524cdef6 \
+    --hash=sha256:11210fc13ec7fd177c656405d18b5b0daf50c9cf48ea972e1088db51867fb8c8
 webencodings==0.5.1 \
     --hash=sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78 \
     --hash=sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923