Add .readthedocs.yaml, upgrade Python to 3.9 and upgrade package

Old version of python was 3.8 or lower, but this isn't supported any more.

To upgrade to 3.9 need to upgrade transifex-client,
as the old version of that we were using isn't supported in 3.9.

If you run pip-compile there are actually layout changes to requirements.txt
but I edited many of them back so we can see that other packages don't
change in this commit.

Need to use an older version of setuptools, or installing dependencies fails

#538

.readthedocs.yaml

@@ -0,0 +1,43 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  apt_packages:
+    - graphviz
+    - libgraphviz-dev
+  tools:
+    python: "3.9"
+  jobs:
+    install:
+      - pip install setuptools==70
+      - python -m pip install --exists-action=w --no-cache-dir -r requirements.txt
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+# formats:
+#    - pdf
+
+# Optionally declare the Python requirements required to build your docs
+python:
+  install:
+    - requirements: requirements.txt
+
+# You can include or exclude git submodules from the Read the Docs
+# documentation build.
+# https://docs.readthedocs.io/en/stable/config-file/v2.html#submodules
+submodules:
+  include: all
+
+
+
+
+

requirements.txt

@@ -1,8 +1,8 @@
 #
-# This file is autogenerated by pip-compile
-# To update, run:
+# This file is autogenerated by pip-compile with Python 3.9
+# by the following command:
 #
-#    pip-compile
+#    pip-compile requirements.in
 #
 -e git+https://github.com/OpenDataServices/sphinxcontrib-jsonschema.git@a1e21704186b8e46f161a5b29c3f7bfeace5ca09#egg=sphinxcontrib-jsonschema  # via -r requirements.in
 -e git+https://github.com/OpenDataServices/sphinxcontrib-opendataservices.git@bc2f9a83a2562a50aa9386fb9c1d30161ed5120e#egg=sphinxcontrib-opendataservices  # via -r requirements.in
@@ -15,7 +15,7 @@ chardet==3.0.4            # via requests
 click==7.1.2              # via sphinx-intl
 commonmark==0.9.1         # via recommonmark
 docutils==0.13.1          # via -r requirements.in, recommonmark, sphinx
-git+https://github.com/OpenDataServices/erd-from-json-table-schema.git  # via -r requirements.in
+erd-from-json-table-schema @ git+https://github.com/OpenDataServices/erd-from-json-table-schema.git  # via -r requirements.in
 gitdb==4.0.5              # via gitpython
 gitpython==3.1.3          # via transifex-client
 idna==2.10                # via requests
@@ -49,7 +49,7 @@ sphinxcontrib-jsmath==1.0.1  # via sphinx
 sphinxcontrib-qthelp==1.0.3  # via sphinx
 sphinxcontrib-serializinghtml==1.1.4  # via sphinx
 text-unidecode==1.3       # via python-slugify
-transifex-client==0.13.11  # via -r requirements.in
+transifex-client==0.14.4   # via -r requirements.in
 urllib3==1.25.9           # via requests, transifex-client
 
 # The following packages are considered to be unsafe in a requirements file: