[ci] Fix Nightly (#4948)

* [ci] Fix nightly test

* Add python 3.7 3.9 in nightly

Author: qiao-bo

.github/workflows/release.yml

@@ -56,10 +56,10 @@ jobs:
             echo '::set-output name=matrix_osx::{"include":[{"name":"taichi","python":"3.8"},{"name":"taichi","python":"3.9"},{"name":"taichi","python":"3.10"}]}"'
           else
             # For nightly release, we run on three python versions.
-            echo '::set-output name=matrix::{"include":[{"name":"taichi-nightly","python":"3.6","conda_python":"py36"},{"name":"taichi-nightly","python":"3.8","conda_python":"py38"},{"name":"taichi-nightly","python":"3.10","conda_python":"py310"}]}"'
+            echo '::set-output name=matrix::{"include":[{"name":"taichi-nightly","python":"3.6","conda_python":"py36"},{"name":"taichi-nightly","python":"3.7","conda_python":"py37"},{"name":"taichi-nightly","python":"3.8","conda_python":"py38"},{"name":"taichi-nightly","python":"3.9","conda_python":"py39"},{"name":"taichi-nightly","python":"3.10","conda_python":"py310"}]}"'
 
             # M1 only supports py38 and py310(conda), so change matrix.
-            echo '::set-output name=matrix_osx::{"include":[{"name":"taichi-nightly","python":"3.8"},{"name":"taichi-nightly","python":"3.10"}]}"'
+            echo '::set-output name=matrix_osx::{"include":[{"name":"taichi-nightly","python":"3.8"},{"name":"taichi-nightly","python":"3.9"},{"name":"taichi-nightly","python":"3.10"}]}"'
           fi
 
   build_and_test_linux:
@@ -402,6 +402,7 @@ jobs:
           . venv\Scripts\activate.ps1
           python -c "import taichi"
           pip install torch
+          pip install -r requirements_test.txt
           ti diagnose
           python tests/run_tests.py -vr2 -t2
         env: