Replace dependency md5-jkmyiers dependency by md5.js

md5-jkmyiers cannot be built into a JS module due to sloppy code

lib/pouch-utils.js

@@ -77,11 +77,11 @@ exports.inherits = require('inherits');
 exports.Promise = Promise;
 
 var crypto = require('crypto');
-var md5 = require('md5-jkmyers');
+var md5 = require('md5.js');
 exports.MD5 = function (string) {
   /* istanbul ignore if */
   if (process.browser) {
-    return md5(string);
+    return new md5().update(string).digest('hex');
   }
   return crypto.createHash('md5').update(string).digest('hex');
 };

package.json

@@ -38,7 +38,7 @@
     "json-stable-stringify": "^1.0.1",
     "lie": "^2.6.0",
     "lunr": "0.7.1",
-    "md5-jkmyers": "0.0.1",
+    "md5.js": "^1.3.5",
     "pouchdb-extend": "^0.1.0",
     "pouchdb-mapreduce-no-ddocs": "^2.3.2",
     "pouchdb-promise": "5.4.4",