Avoid toml import in blender version < 4.20

__init__.py

@@ -3,6 +3,7 @@
 from bpy.app import background, version_string
 from .utilities import get_min_blender_version
 
+global bl_info
 bl_info = {
     "name": "CAD Sketcher",
     "author": "hlorus",

utilities/__init__.py

@@ -1,19 +1,34 @@
-import pathlib, toml
+from bpy.app import version
+import pathlib
 
-def get_addon_version():
+def get_bl_info():
+
+    from .. import bl_info
+    return bl_info
+
+
+def get_addon_version() -> str:
     """Return addon version from manifest file"""
 
+    if version < (4, 20):
+        return str(get_bl_info()["version"])
+
     manifest = pathlib.Path(__file__).parent.parent / "blender_manifest.toml"
     try:
-        return toml.load(manifest)["version"]
+        import toml
+        return toml.load(manifest)["blender"]
     except Exception:
         return ""
 
-def get_min_blender_version():
+def get_min_blender_version() -> str:
     """Returns the minimal required blender version from manifest file"""
 
+    if version < (4, 20):
+        return str(get_bl_info()["version"])
+
     manifest = pathlib.Path(__file__).parent.parent / "blender_manifest.toml"
     try:
+        import toml
         return toml.load(manifest)["blender_version_min"]
     except Exception:
         return ""