doc: add travis badge

rvagg · rvagg · commit 0d5a415a148c · 2020-01-03T11:32:24.000+11:00
PR-URL: #1971 Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 # `node-gyp` - Node.js native addon build tool
 
+[![Build Status](https://travis-ci.com/nodejs/node-gyp.svg?branch=master)](https://travis-ci.com/nodejs/node-gyp)
+
 `node-gyp` is a cross-platform command-line tool written in Node.js for
 compiling native addon modules for Node.js. It contains a fork of the
 [gyp](https://gyp.gsrc.io) project that was previously used by the Chromium
