add tap-spec to format output

package.json

@@ -24,6 +24,7 @@
     "aws-sdk": "^2.1.9",
     "mapbox-gl-test-suite": "git://github.com/mapbox/mapbox-gl-test-suite",
     "mkdirp": "^0.5.0",
+    "tap-spec": "^2.2.1",
     "tape": "^3.5.0"
   },
   "scripts": {

test/js/concurrency.test.js

@@ -3,6 +3,12 @@
 /* jshint node:true */
 
 var test = require('tape');
+var tapSpec = require('tap-spec');
+
+test.createStream()
+  .pipe(tapSpec())
+  .pipe(process.stdout);
+
 var mbgl = require('../..');
 var fs = require('fs');
 var path = require('path');

test/js/file_source.test.js

@@ -3,6 +3,12 @@
 /* jshint node: true */
 
 var test = require('tape');
+var tapSpec = require('tap-spec');
+
+test.createStream()
+  .pipe(tapSpec())
+  .pipe(process.stdout);
+
 var mbgl = require('../..');
 
 test('FileSource', function(t) {

test/js/map.test.js

@@ -3,6 +3,12 @@
 /* jshint node: true */
 
 var test = require('tape');
+var tapSpec = require('tap-spec');
+
+test.createStream()
+  .pipe(tapSpec())
+  .pipe(process.stdout);
+
 var mbgl = require('../..');
 var fs = require('fs');
 var path = require('path');

test/render.test.js

@@ -3,6 +3,12 @@
 /* jshint node:true */
 
 var test = require('tape');
+var tapSpec = require('tap-spec');
+
+test.createStream()
+  .pipe(tapSpec())
+  .pipe(process.stdout);
+
 var mbgl = require('..');
 var fs = require('fs');
 var path = require('path');