GM_deleteValue not deleting values

[ccd0]

Using:
JS Blocker 5 5.1.0
Safari 9.1.1 (10601.6.17)

Test script:

// ==UserScript==
// @name Test
// @namespace RCjQiTmr2bWFPcR-5.1.0-160420
// @include http://www.example.com/
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_deleteValue
// ==/UserScript==

alert([1, GM_getValue("key", "not set")]);
GM_setValue("key", "value");
alert([2, GM_getValue("key", "not set")]);
GM_deleteValue("key");
alert([3, GM_getValue("key", "not set")]);

This should show the alerts
1,not set
2,value
3,not set
but with JS Blocker it shows
1,not set
2,value
3,value
on the first run and
1,value
2,value
3,value
thereafter.

[infernoboy]

I somehow forgot to add the removeItem method to Commands.injected.userScript.storage; debug mode shows that the command doesn't even exist! Will be fixed in 5.1.2.