ci: unleash the paralleltest lints (#129)

Author: austinvalle

.golangci.yml

@@ -15,7 +15,7 @@ linters:
     - makezero
     - misspell
     - nilerr
-    # - paralleltest # Reference: https://github.com/kunwardeep/paralleltest/issues/14
+    - paralleltest
     - predeclared
     - staticcheck
     - tenv