Handle readthedocs not recognizing poetry

Author: vivekjoshy

.readthedocs.yml

@@ -17,5 +17,9 @@ sphinx:
 
 # Optionally declare the Python requirements required to build your docs
 python:
-   install:
-   - requirements: docs/requirements.txt
+  version: 3.10
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs

pyproject.toml

@@ -53,6 +53,9 @@ bump2version = "^1.0.1"
 black = "^21.11b1"
 furo = "^2022.1.2"
 
+[tool.poetry.extras]
+docs = ["sphinx", "furo"]
+
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = "-ra --strict-markers --ignore=docs/conf.py --ignore=setup.py --ignore=ci --ignore=.eggs --doctest-modules --doctest-glob=/*.rst --tb=short"