change utf8_encode and utf8_decode

ensure strictly valid UTF-8 output by using utf-8-strict instead of utf8
(see in Encode: 'encode_utf8' and 'UTF-8 vs. utf8 vs. UTF8'
 and in perlunifaq: What's the difference between "UTF-8" and "utf8"?)

Change-Id: I6d8797ddd24339ecf2ab4ccacad3801a6a054ca2
4 files changed
tree: a12a08d43a93b781c8f03ff8964aa4fa3e38c6c2
  1. lib/
  2. script/
  3. t/
  4. xt/
  5. .gitignore
  6. LICENSE
  7. Makefile.PL