release v0.1.2

Author: dgoffredo

src/datadog/version.cpp

@@ -3,8 +3,8 @@
 namespace datadog {
 namespace tracing {
 
-const char* const tracer_version = "v0.1.1";
-const char* const tracer_version_string = "[dd-trace-cpp version v0.1.1]";
+const char* const tracer_version = "v0.1.2";
+const char* const tracer_version_string = "[dd-trace-cpp version v0.1.2]";
 
 }  // namespace tracing
 }  // namespace datadog