fix(api): prevent MaxListenersExceededWarning

- by moving the process.on outside of run function

Closes #597

Signed-off-by: Prokop Simek <prokop.simek@applifting.cz>

bin/npm-check-updates

@@ -1,4 +1,4 @@
 #!/usr/bin/env node
 'use strict';
 
-require('node-alias')('ncu', __dirname, { message: false });
+require('node-alias')('ncu', __dirname, {message: false});

lib/npm-check-updates.js

@@ -382,14 +382,13 @@ async function findPackage(options) {
     return Promise.all([pkgData, pkgFile]);
 }
 
-/** main entry point */
-async function run(options={}) {
-
-    // exit with non-zero error code when there is an unhandled promise rejection
-    process.on('unhandledRejection', err => {
-        throw err;
-    });
+// exit with non-zero error code when there is an unhandled promise rejection
+process.on('unhandledRejection', err => {
+    throw err;
+});
 
+/** main entry point */
+async function run(options = {}) {
     // if not executed on the command-line (i.e. executed as a node module), set some defaults
     if (!options.cli) {
         options = _.defaults({}, options, {