tests: configure omitted files

Author: elopez

.gitignore

@@ -9,3 +9,4 @@ build/
 dist/
 *.egg
 *.egg-info/
+.coverage

pyproject.toml

@@ -142,5 +142,12 @@ disallow_untyped_defs = false
 disallow_incomplete_defs = false
 disallow_untyped_decorators = false
 
+[tool.coverage.run]
+omit = [
+    "solc_select/__main__.py",
+    "solc_select/solc_select.py",
+    "solc_select/utils.py"
+]
+
 [tool.uv]
 python-preference = "only-managed"