Release 2.7.0: allow cancelling headers that use dynamic table

Release 2.6.6: Prevent a double-free when allocation fails

Release 2.6.5: Fix use-after-free that occurs in specific usage.

Fixes #87

Release 2.6.4: packaging fixes only

[VERSION] Bump to 2.6.3; update Copyright notices

[VERSION] update version to 2.6.2

version v2.6.1

[VERSION] update version to 2.6.0

[MISC] fix compiling error for MSVC. 'FALL_THROUGH': undeclared ident… (

#66)

* [MISC] fix compiling error for MSVC. 'FALL_THROUGH': undeclared identifier

* [MISC] fix compiling error for MSVC. 'FALL_THROUGH': undeclared identifier

Merge branch 'master' of github.com:litespeedtech/ls-qpack