Uplift rebar3 -> 3.18.0 (#431)

rebar.config

@@ -1,10 +1,11 @@
-{minimum_otp_vsn, "22.0"}.
+{minimum_otp_vsn, "22.3"}.
 
-{erl_opts,
+{erl_opts, [warnings_as_errors]}.
-    [warnings_as_errors,
-        {platform_define, "^2[2-5]{1}", if_check}]}.
 
-{xref_checks, [undefined_function_calls,undefined_functions]}.
+{xref_checks,
+  [undefined_function_calls,undefined_functions,
+    locals_not_used,
+    deprecated_function_calls, deprecated_functions]}.
 
 {cover_excl_mods,
   [testutil,
@@ -25,7 +26,7 @@
  ]}.
 
 {deps, [
-  {lz4, ".*", {git, "https://github.com/martinsumner/erlang-lz4", {branch, "develop-3.1"}}},
+  {lz4, ".*", {git, "https://github.com/nhs-riak/erlang-lz4", {branch, "nhse-develop"}}},
   {zstd, ".*", {git, "https://github.com/nhs-riak/zstd-erlang", {branch, "nhse-develop"}}}
         ]}.
 

src/leveled_pmanifest.erl

@@ -74,7 +74,7 @@
             % At o(10) trillion keys behaviour may become increasingly 
             % difficult to predict.
 
--ifdef(if_check).
+-if(OTP_RELEASE >= 25).
 -if(length(?LEVEL_SCALEFACTOR) /= ?MAX_LEVELS).
 -error("length ?LEVEL_SCALEFACTOR differs from ?MAX_LEVELS").
 -endif.