use pkgdown dev & release

Deploy from Travis build 14049 [ci skip]

Build URL: https://travis-ci.org/mlr-org/mlr/builds/568271780
Commit: 842fbb2

Bump version to 2.14.0.9000

fixed ibrier measure (mlr-org#2425)

* fixed ibrier measure

* Changed F to FALSE

Version 2.12

Version 2.11

Version 2.10

Version 2.9