tests: express@~4.17.1

Author: dougwilson

test/4.x/index.js

@@ -14,7 +14,7 @@ before(function (done) {
   var env = utils.childEnvironment()
 
   this.timeout(30000)
-  exec('npm install --prefix . express@4.12.0', { cwd: __dirname, env: env }, function (err, stderr) {
+  exec('npm install --prefix . express@~4.17.1', { cwd: __dirname, env: env }, function (err, stderr) {
     if (err) {
       err.message += stderr
       done(err)