0.9664 2022-12-01
  [Internal Compatible Changes]
    * Added spvm_inline_api.h and use it in spvm_api.c, spvm_api_vm.c, spvm_precompile.c
  [New Features]
    * Added the new syntax of the octal escape character and 3digit is allowed.
      \1, \2, \3, \4, \5, \6, \7, \8, \9
      \377
      \o{377}

  [Imcompatible New Features and Changes]
    * \1, \2, \3, \4, \5, \6, \7, \8, \9 is not raw escape character.
      This becomes the part of the octal escape character.