🩹 Fix missing API docs by installing zen3geo package

Need to do `pip install .` so that API docs actually render. Also discovered issue with pyproject.toml build-system so fixed that too.

.github/workflows/deploy-docs.yml

@@ -30,7 +30,10 @@ jobs:
 
     # Install dependencies needed for documentation build
     - name: Install docs build dependencies
-      run: pip install jupyter-book
+      run: |
+        pip install jupyter-book
+        pip install .
+        pip list
 
     # Build the docs
     - name: Build the docs

pyproject.toml

@@ -30,5 +30,5 @@ enable = true
 style = "semver"
 
 [build-system]
-requires = ["poetry-core>=1.0.0", "poetry-dynamic-versioning"]
-build-backend = "poetry.core.masonry.api"
+requires = ["poetry>=1.2.0b1", "poetry-dynamic-versioning"]
+build-backend = "poetry.masonry.api"