Update to h2-16, hpack-10

Closes #1179

Note that there are no hpack tests for draft 10, yet. I left the test version at 9, since there is no implementation change.
I renamed the mutator as literally the http2 spec calls this `SETTINGS_HEADER_TABLE_SIZE` eventhough in hpack it is used to limit the dynamic table. Static headers are no longer copied in hpack, so that's why the table is named dynamic table now.