Update to ruby-ttfunk to 1.6.2.1.
## [1.6.2.1]
### Fixed
* 1.6.2 gem conains local debuging code. This is the same commit but without
local changes.
Alexander Mankuta
## [1.6.2]
### Fixed
* Reverted to pre 1.6 maxp table serialization.
Cameron Dutro
Update ruby-ttfunk to 1.6.1.
pkgsrc change: add "USE_LANGUAGES= # none".
## [1.6.1]
### Fixed
* Fixed maxp table encoding
Cameron Dutro
## [1.6.0]
### Added
* OpenType fonts support
* Added support for CFF-flavored fonts (also known as CID-keyed or OpenType fonts)
* Added support for the VORG and DSIG tables
* Improved charset encoding support
* Improved font metrics calculations in the head, maxp, hhea, hmtx, and os/2 tables
* Subsetted fonts verified with Font-Validator, fontlint, and Mac OS's Font Book
Cameron Dutro
* Ruby 2.6 support
Alexander Mankuta
* JRuby 9.2 support
Alexander Mankuta
### Removed
* Dropped Ruby 2.1 & 2.2 support
Alexander Mankuta
* Removed JRuby 9.1 support
Alexander Mankuta
### Fixed
* Sort name table entries when generating subset font
Matjaz Gregoric
* Map the 0xFFFF char code to glyph 0 in cmap format 4
Matjaz Gregoric
* Order tables by tag when generating font subset
Matjaz Gregoric
* Fix typo in TTFunk::Subset::Unicode#includes?
Matjaz Gregoric
* Fixe calculation of search_range for font subsets
Matjaz Gregoric
* Fixed instance variable @offset and @length not initialized
Katsuya HIDAKA
* Code style fixes
Katsuya HIDAKA, Matjaz Gregoric, Alexander Mankuta
## [1.5.0] - 2017-02-13
### Added
* Support for reading TTF fonts from TTC files
### Changed
* Subset font naming is consistent now and depends on content