Update DustMite

Commits:
* ce686c0 splitter: Improve EOF handling
* ff4f094 Add eol test (current result: DustMite crashes)
* 529a3f4 splitter: Fix words and lines splitters
* 258f68b tests: Fix lines test
* 02f9043 tests: Update words test result
* 2144de1 tests: Add c++ (dump only)
* 98bd679 tests: Add lines test
* c160f40 splitter: Add lines splitter
* 1f8c7ab tests: Add words test
* 5f03fc7 Add --split option
* d6fdb4c dustmite: Reconcile dashes in negative switches (recognize both)
* d770e2f splitter: Fix propagating noRemove during optimization
* 8d00012 Tweak noremove2 test
* ef59cea Add noremove2 test
* 2f0f2dd splitter: Wrap all of a file's entities into one
* b5ab6c4 tests: Add "empty" test
* 987eee9 dustmite: Redirect tester to nul automatically