Fix tests

Author: virtuald

subprojects/robotpy-wpiutil/tests/run_tests.py

@@ -16,9 +16,10 @@
             "pip",
             "--disable-pip-version-check",
             "install",
+            "-v",
+            "--force-reinstall",
             "--no-build-isolation",
-            "-e",
-            "cpp",
+            "./cpp",
         ],
     )