pin polyagamma (#7418)

* Update requirements-dev.txt

* test: pin polyagamma version for testing until a fix found

* Revert "Update requirements-dev.txt"

This reverts commit 5d37b25.

Author: ferrine

.github/workflows/tests.yml

@@ -169,7 +169,8 @@ jobs:
         run: |
           conda activate pymc-test
           pip install -e .
-          pip install --pre -U polyagamma
+          # TODO: https://github.com/pymc-devs/pymc/issues/7417
+          pip install --pre -U 'polyagamma<1.3.7'
           python --version
           conda list
       - name: Run tests
@@ -244,7 +245,7 @@ jobs:
         run: |
           conda activate pymc-test
           pip install -e .
-          pip install --pre -U polyagamma
+          pip install --pre -U 'polyagamma<1.3.7'
           python --version
           conda list
       - name: Run tests
@@ -466,7 +467,7 @@ jobs:
         run: |
           conda activate pymc-test
           pip install -e .
-          pip install --pre -U polyagamma
+          pip install --pre -U 'polyagamma<1.3.7'
           python --version
           conda list
       - name: Run tests