use requirements to pin requirements

Author: mikofski

docs/requirements.txt

@@ -0,0 +1,17 @@
+numpy>=1.16.0
+pandas>=0.25.0
+pytz
+requests
+scipy>=1.4.0
+h5py
+ipython
+matplotlib
+sphinx==4.5.0
+pydata-sphinx-theme==0.8.1
+sphinx-gallery
+docutils==0.15.2
+pillow
+netcdf4
+siphon
+sphinx-toggleprompt>=0.0.5
+pvfactors==1.5.2

readthedocs.yml

@@ -22,7 +22,6 @@ sphinx:
 # Optionally declare the Python requirements required to build your docs
 python:
   install:
-    # - requirements: docs/requirements.txt
     - method: pip
       path: .
       extra_requirements:
@@ -39,3 +38,6 @@ python:
 
     # replaced by python.install in v2
     # pip_install: true
+
+    # pin requirements (recommended)
+    - requirements: docs/requirements.txt