Update default setuptools_scm version scheme to release-branch-semver.

This fixes the circular dependency issue between blacs and labscript-devices.

.github/workflows/release.yml

@@ -15,7 +15,6 @@ defaults:
 
 env:
   PACKAGE_NAME: blacs
-  SCM_VERSION_SCHEME: release-branch-semver
   SCM_LOCAL_SCHEME: no-local-version
   ANACONDA_USER: labscript-suite
 

blacs/__version__.py

@@ -5,15 +5,10 @@
 except ImportError:
     import importlib_metadata
 
-VERSION_SCHEME = {
-    "version_scheme": os.getenv("SCM_VERSION_SCHEME", "guess-next-dev"),
-    "local_scheme": os.getenv("SCM_LOCAL_SCHEME", "node-and-date"),
-}
-
 root = Path(__file__).parent.parent
 if (root / '.git').is_dir():
     from setuptools_scm import get_version
-    __version__ = get_version(root, **VERSION_SCHEME)
+    __version__ = get_version(root, version_scheme="release-branch-semver")
 else:
     try:
         __version__ = importlib_metadata.version(__package__)

pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools", "wheel", "setuptools_scm"]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=4.1.0"]
 build-backend = "setuptools.build_meta"

setup.py

@@ -2,7 +2,7 @@
 from setuptools import setup
 
 VERSION_SCHEME = {
-    "version_scheme": os.getenv("SCM_VERSION_SCHEME", "guess-next-dev"),
+    "version_scheme": os.getenv("SCM_VERSION_SCHEME", "release-branch-semver"),
     "local_scheme": os.getenv("SCM_LOCAL_SCHEME", "node-and-date"),
 }