Add task pool, minor changes

- Add task pool to smooth impact when list in config is pretty long
- Update dependencies
- Update config

vendor/github.com/alitto/pond/Makefile

@@ -0,0 +1,5 @@
+test:
+	go test -race -v ./
+
+coverage:
+	go test -race -v -coverprofile=coverage.out -covermode=atomic ./