allow haskell-src-exts 1.14
(cherry picked from commit af02c85ac1127936a92886c630ad9ae03a3337dc)
Bump version to 0.4.0.1
Release notes for 0.4.0.1
(cherry picked from commit d4d94f2b7311e3c2e2f1260877a079a505eea234)