Merge pull request #20 from apache/remove-required-otp-version

Remove required otp version
diff --git a/.gitignore b/.gitignore
index 61b4fa5..24dbac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,8 +2,10 @@
 ebin
 priv
 .eunit
+*.d
 *.o
 *.lo
 *.la
 *~
 *.swp
+compile_commands.json
diff --git a/rebar.config b/rebar.config
index 3b93f8a..cfc4d73 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,5 +1,3 @@
-{require_otp_vsn, "R14|R15|R16|17|18|19|20|21|22|23|24|25"}.
-
 {erl_opts, [debug_info, warn_unused_vars, warn_shadow_vars, warn_unused_import]}.
 {port_sources, ["c_src/*.cc", 
                 "c_src/snappy/*.cc"]}.