Update to oidcc rc version

Author: maennchen

rebar.config

@@ -4,7 +4,7 @@
 
 {deps, [
     {cowboy, "~> 2.10"},
-    {oidcc, "3.0.0-alpha.5"},
+    {oidcc, "3.0.0-rc.1"},
     %% TODO: Switch to official package once this PR is merged and released:
     %% https://github.com/chvanikoff/cowboy_session/pull/3
     {cowboy_session, "2.0.0-alpha.1", {pkg, oidcc_cowboy_session}}