TST: add pytest*, astropy, matplotlib + pandas deps for dev job

tox.ini

@@ -28,6 +28,29 @@ deps =
     dev: matplotlib>=0.0.dev0
     dev: git+https://github.com/contourpy/contourpy.git
     dev: git+https://github.com/pandas-dev/pandas.git
+    # pytest*
+    dev: coverage
+    dev: flake8
+    dev: iniconfig
+    dev: mccabe
+    dev: packaging
+    dev: pluggy
+    dev: pycodestyle
+    dev: pyflakes
+    # astropy
+    dev: astropy-iers-data
+    dev: pyyaml
+    # matplotlib
+    dev: cycler
+    dev: fonttools
+    dev: kiwisolver
+    dev: pillow
+    dev: pyparsing
+    # pandas
+    dev: python-dateutil
+    dev: pytz
+    dev: six
+    dev: tzdata
     lts: astropy==5.0.*
     lts: matplotlib==3.5.*
     # Pin numpy-lts until permanent solution for #2353/#2428
@@ -51,7 +74,8 @@ extras =
     all: all
     docs: docs
     visual: visualtest
-# Need `--no-deps` as long as pandas and contours have no branch for numpy>=2.0
+# Need `--no-deps` as long as pandas and contours have no branch for numpy>=2.0 -
+# for as long all test deps need to be manually pulled in above as well!
 install_command =
     !dev: python -I -m pip install
     dev: python -I -m pip install -v --pre --no-deps