548295: update org.eclipse.mylyn.tasks versions to 3.26

Change-Id: I7afb5a9bd14643dce4695a29e071dbc3644c4128
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=548295 (+1 squashed commit)
Signed-off-by: Colin Ritchie <colin.ritchie@tasktop.com>
73 files changed