Setup build with Python Limited API 3.8

Author: althonos

pyproject.toml

@@ -43,7 +43,7 @@ dependencies = [
 
 [tool.maturin]
 manifest-path = "sphinxcontrib/svgbob/_svgbob/Cargo.toml"
-features = ["extension-module"]
+features = ["extension-module", "abi3"]
 module-name = "sphinxcontrib.svgbob._svgbob"
 
 [tool.cibuildwheel]
@@ -62,4 +62,4 @@ environment = { MACOSX_DEPLOYMENT_TARGET = "10.12" }
 before-all = [
   "curl -sSf https://sh.rustup.rs | sh -s -- -y",
   "rustup target add aarch64-apple-darwin"
-]
+]

sphinxcontrib/svgbob/_svgbob/Cargo.toml

@@ -30,5 +30,6 @@ version = "0.7.2"
 
 [features]
 default = []
+abi3 = ["pyo3/abi3-py38"]
 nightly = ["pyo3/nightly"]
 extension-module = ["pyo3/extension-module"]