Use forked oidc-client to support ghc < 8.4

Author: akshaymankar

stack.yaml

@@ -2,8 +2,9 @@ resolver: lts-13.9
 extra-deps:
 - jsonpath-0.1.0.1
 - jwt-0.10.0
-- oidc-client-0.4.0.0
 - katip-0.8.0.0
+- git: https://github.com/akshaymankar/haskell-oidc-client
+  commit: a8473ac96a6db919f789578a08adaa13a0a3e1d5
 packages:
 - kubernetes
 - kubernetes-client