Add patch to use mocha

debian/patches/series

+use-mocha.patch

debian/patches/use-mocha.patch

+diff --git a/test.js b/test.js
+index 840baf8..1fe0a5c 100644
+--- a/test.js
++++ b/test.js
+@@ -1,7 +1,7 @@
+-import test from 'ava';
+-import m from '.';
++var m = require('.');
++var assert = require('assert');
+ 
+-test('main', t => {
+-	t.deepEqual(m([1, 2, 2, 3, 1, 2, 4]), [1, 2, 3, 4]);
+-	t.deepEqual(m(['a', 'a', 'b', 'a', 'c', 'a', 'd']), ['a', 'b', 'c', 'd']);
++test('main', function() {
++	assert(m([1, 2, 2, 3, 1, 2, 4]), [1, 2, 3, 4]);
++	assert(m(['a', 'a', 'b', 'a', 'c', 'a', 'd']), ['a', 'b', 'c', 'd']);
+ });