Support disabling reporter in programmatic API

Author: vweevers

README.md

@@ -272,6 +272,8 @@ hallmark --report json
 hallmark --report [ json --pretty ]
 ```
 
+In the programmatic API of `hallmark` (which is not documented yet) the reporter can also be disabled by passing `{ report: false }` as the options.
+
 ## Install
 
 With [npm](https://npmjs.org) do:

index.js

@@ -31,7 +31,9 @@ function hallmark (options, callback) {
     let reporter
     let reporterOptions
 
-    if (options.report) {
+    if (options.report === false) {
+      reporter = function noop () {}
+    } else if (options.report) {
       // Only take one --report option
       reporter = [].concat(options.report)[0]