Updating tools/iqtree from version 2.1.2 to 2.2.0.3

[planemo-autoupdate]

Hello! This is an automated update of the following tool: tools/iqtree. I created this PR because I think the tool's main dependency is out of date, i.e. there is a newer version available through conda.

I have updated tools/iqtree from version 2.1.2 to 2.1.4_beta.

Project home page: http://www.iqtree.org

[bernt-matthias]

Do we want beta releases? Also I can't find 2.1.4 on github or the project home page...

[simonbray]

Do we want beta releases?

I assume not, but I don't think they should be in bioconda either

Also I can't find 2.1.4 on github or the project home page...

https://github.com/iqtree/iqtree2/releases/tag/v2.1.4-beta

[bernt-matthias]

https://github.com/iqtree/iqtree2/issues/49

[bernt-matthias]

Converting this to a draft. Status should be changed only if there is a new stable release?