Update to 2.03

• While I'm here, add LICENSE_FILE

2.03

• fix man page build due to non-ASCII char (thanks, Anton!)

2.02

• add option --caseful-sz to optionally treat upper-/lowercasing of sz. This also fixes unwanted unidirectional lowercasing of U+1E9E

2.01

• map : instead of / in SFU mapping tables

PR: 220491
Submitted by: Anton Yuzhaninov <citrin@citrin.ru>
Approved by: Kuang-che Wu <kcwu@csie.org> (maintainer)