Update tensorflow-probability requirement (#847)

Updates the requirements on [tensorflow-probability](https://github.com/tensorflow/probability) to permit the latest version.
- [Release notes](https://github.com/tensorflow/probability/releases)
- [Commits](tensorflow/probability@0.8.0...v0.21.0)

---
updated-dependencies:
- dependency-name: tensorflow-probability
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -18,7 +18,7 @@ def readme():
     ],
     # https://github.com/SeldonIO/alibi-detect/issues/375 and 387
     "tensorflow": [
-        "tensorflow_probability>=0.8.0, <0.21.0",
+        "tensorflow_probability>=0.8.0, <0.22.0",
         "tensorflow>=2.2.0, !=2.6.0, !=2.6.1, <2.14.0",  # https://github.com/SeldonIO/alibi-detect/issues/375 and 387
     ],
     "keops": [
@@ -27,7 +27,7 @@ def readme():
     ],
     "all": [
         "prophet>=1.1.0, <2.0.0",
-        "tensorflow_probability>=0.8.0, <0.21.0",
+        "tensorflow_probability>=0.8.0, <0.22.0",
         "tensorflow>=2.2.0, !=2.6.0, !=2.6.1, <2.14.0",  # https://github.com/SeldonIO/alibi-detect/issues/375 and 387
         "pykeops>=2.0.0, <2.2.0",
         "torch>=1.7.0, <1.14.0"