Merge pull request #239 from tsloughter/exporter-bump-sdk-api-1.0-rc1

bump exporter deps to 1.0.0-rc.1

Author: tsloughter

apps/opentelemetry_exporter/rebar.config

@@ -1,7 +1,7 @@
 {erl_opts, [debug_info]}.
 {deps, [grpcbox,
-        opentelemetry,
-        opentelemetry_api]}.
+        {opentelemetry, "~> 1.0.0-rc.1"},
+        {opentelemetry_api, "~> 1.0.0-rc.1"}]}.
 
 {grpc, [{protos, ["opentelemetry-proto/opentelemetry/proto/collector/trace/v1"]},
         {gpb_opts, [{module_name_prefix, "opentelemetry_exporter_"},