Bump the pip group across 2 directories with 1 update

Updates the requirements on  and [tensorflow](https://github.com/tensorflow/tensorflow) to permit the latest version.

Updates `tensorflow` to 2.18.1
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/v2.18.1/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.8.0...v2.18.1)

Updates `tensorflow` to 2.18.1
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/v2.18.1/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.8.0...v2.18.1)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: tensorflow
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-rtd.txt

@@ -1,5 +1,5 @@
 pandas>=0.19.2
-tensorflow==2.8.*
+tensorflow==2.18.*
 requests
 tqdm
 numpy

setup.py

@@ -108,7 +108,7 @@ def run_tests(self):
     # https://packaging.python.org/en/latest/requirements.html
     install_requires=[
         "pandas>=0.19.2",
-        "tensorflow==2.8.*",
+        "tensorflow>=2.8,<2.19",
         "requests",
         "tqdm",
     ],

streamlit/requirements.txt

@@ -1,5 +1,5 @@
 pandas>=0.19.2
-tensorflow==2.8.*
+tensorflow==2.18.*
 requests
 tqdm
 numpy