There is no release yet because of all the bugs in the MCPE client which require workarounds that might become obsolete when (if?) MS release 1.5 patches: https://forums.pmmp.io/threads/1-5-support.6241/#post-54221
Well, you could use a development build of PMMP like me (branch mc-broken-ed-1.5 on github repo), but expect both it and mcpe to have major glitches / problems / bugs. (Thanks Microsoft) Getting PHAR files from the 1.5 version can be complicated, i made a repository where you can get the latest development PocketMine-MP.phar version for MCPE 1.5 in case you don't know how to do it yourself.