use `pyproject.toml` for activating `pyo3/extension-module`

Since the merge of https://github.com/PyO3/maturin/pull/605 ,
we can add features flag when maturin build the python project, removing
the need to always enabling `extension-module` flag when building.

The `extension-module` flag creates crash when building and testing outside
of maturin.

Previous fix required to disable default feature flag when building and testing which is not ideal.

.github/workflows/ci.yml

@@ -18,11 +18,9 @@ jobs:
       - name: "Check"
         run: cargo check --all
       - name: "Build" 
-        # Has to use `--no-default-features` to avoid crash. 
-        # See: https://pyo3.rs/latest/faq.html#i-cant-run-cargo-test-im-having-linker-issues-like-symbol-not-found-or-undefined-reference-to-_pyexc_systemerror
-        run: cargo build --all --no-default-features
+        run: cargo build --all 
       - name: "Test"
-        run: cargo test --all --no-default-features
+        run: cargo test --all
 
   clippy:
     name: "Clippy"

apis/python/node/Cargo.toml

@@ -18,8 +18,3 @@ serde_yaml = "0.8.23"
 [lib]
 name = "dora"
 crate-type = ["cdylib"]
-
-
-[features]
-extension-module = ["pyo3/extension-module"]
-default = ["extension-module"]

apis/python/node/pyproject.toml

@@ -0,0 +1,9 @@
+[build-system]
+requires = ["maturin>=0.12,<0.13"]
+build-backend = "maturin"
+
+[project]
+name = "dora"
+
+[tool.maturin]
+features = ["pyo3/extension-module"]