rebar.config: bump OTP bounds to 22 (#85)

Author: kvelicka

rebar.config

@@ -1,7 +1,7 @@
 %-*-Mode:erlang;coding:utf-8;tab-width:4;c-basic-offset:4;indent-tabs-mode:()-*-
 % ex: set ft=erlang fenc=utf-8 sts=4 ts=4 sw=4 et nomod:
 
-{require_otp_vsn, "17|18|19|20|21"}.
+{require_otp_vsn, "17|18|19|20|21|22"}.
 
 {erl_opts, [fail_on_warning, debug_info, warn_untyped_record]}.
 %%, {parse_transform, eqc_cover}]}.