message: fix: update rust core to 0.3.9
diff: @@ -5,7 +5,7 @@ import bindings = require('bindings');
  const ffiLib: Ffi = bindings('pact.node');
  -export const PACT_FFI_VERSION = '0.3.8';
  +export const PACT_FFI_VERSION = '0.3.9';
  let ffi: typeof ffiLib;
  let ffiLogLevel: LogLevel;
  