release tag version 2.11.4

release tag version 2.11.3

release tag version 2.11.2

release tag version 2.11.1

release tag version 2.11.0

merge develop after cran release

Merge branch 'develop'

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.