1.0.4

Notes:

• Support PHP 8.0
• support python chardet 4.0.0 and python 3
• For PHP5 and before, use v0 branch
  • latest version is 0.0.6.

Changes:

• check build minimum php version #1
• build failure on PHP 8 #2
• segfault occurs when chardet_detect is multiple call with CHARDET_PY flag #10
• support python 3 for py chardet #11