test: drop majyk per-lang-version coverage level (#12)

Closes #11.
diff --git a/noxfile.py b/noxfile.py
index 0d86bbb..249ace7 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -41,7 +41,7 @@
         "--cov-append",
         "--cov-config=.coveragerc",
         "--cov-report=",
-        "--cov-fail-under=97",
+        "--cov-fail-under=0",
         os.path.join("tests", "unit"),
         *session.posargs
     )
@@ -126,4 +126,4 @@
         os.path.join("docs", "_build", "doctrees", ""),
         os.path.join("docs", ""),
         os.path.join("docs", "_build", "html", ""),
-    )
\ No newline at end of file
+    )