fix: add rebar3_path_deps plugin

apps/emqx/rebar.config

@@ -18,7 +18,7 @@
 ]}.
 
 %% Deps here may duplicate with emqx.git root level rebar.config
-%% but there not be any descrpancy.
+%% but there may not be any discrepancy.
 %% This rebar.config is necessary because the app may be used as a
 %% `git_subdir` dependency in other projects.
 {deps, [
@@ -36,7 +36,7 @@
     {snabbkaffe, {git, "https://github.com/kafka4beam/snabbkaffe.git", {tag, "1.0.7"}}}
 ]}.
 
-{plugins, [{rebar3_proper, "0.12.1"}]}.
+{plugins, [{rebar3_proper, "0.12.1"}, rebar3_path_deps]}.
 {extra_src_dirs, [{"etc", [recursive]}]}.
 {profiles, [
     {test, [