Fix ReadTheDocs documentation build with pyproject.toml (#108)

* Fix ReadTheDocs documentation build with pyproject.toml
* Changelog entry
* Update pull request template for pyproject.toml

Author: bgrant

.readthedocs.yaml

@@ -0,0 +1,12 @@
+version: 2
+
+build:
+  tools:
+    python: "3.9"
+
+python:
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - dev

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - [PR 106](https://github.com/salesforce/django-declarative-apis/pull/106) Test against Python 3.11 in PR checks
 - [PR 107](https://github.com/salesforce/django-declarative-apis/pull/107) Update to use pyproject.toml
+- [PR 108](https://github.com/salesforce/django-declarative-apis/pull/107) Fix ReadTheDocs documentation build with pyproject.toml
 - [PR 109](https://github.com/salesforce/django-declarative-apis/pull/109) Update Github actions
 
 # [0.24.0] - 2022-11-03

pull_request_template.md

@@ -1,6 +1,6 @@
 - [ ] Update CHANGELOG.md
 - [ ] Update README.md (as needed)
-- [ ] New dependencies were added to `requirements.txt` or `requirements-dev.txt`
+- [ ] New dependencies were added to `pyproject.toml`
 - [ ] `pip install` succeeds with a clean virtualenv
 - [ ] There are new or modified tests that cover changes
 - [ ] Test coverage is maintained or expanded