Use build key instead of setup.py for mypyc build

Refer to python-poetry/poetry#11

build.py

@@ -0,0 +1,16 @@
+from mypyc.build import mypycify
+
+extensions = mypycify(
+    [
+        "frames2osb/convert.py",
+        "frames2osb/helper.py",
+        "frames2osb/pixels",
+        "frames2osb/quadtree",
+    ]
+)
+
+
+def build(setup_kwargs):
+    """Build extension modules."""
+    kwargs = dict(ext_modules=extensions, zip_safe=False)
+    setup_kwargs.update(kwargs)

pyproject.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 description = "Turns (video) frames to osu!storyboard"
 authors = ["Rendy Arya Kemal <[email protected]>"]
 license = "MIT"
+build = 'build.py'
 
 [tool.poetry.dependencies]
 python = ">3.8,<3.11"
@@ -18,5 +19,5 @@ black = {version = "^21.7b0", allow-prereleases = true}
 types-Pillow = "^8.3.3"
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+requires = ["poetry-core>=1.0.0", "mypy"]
 build-backend = "poetry.core.masonry.api"