API Changes for tree-sitter 0.26 compatibility

• Updated to tree-sitter v0.26.5
• Breaking Changes in tree-sitter 0.26.x API:
  • ts_language_version renamed to ts_language_abi_version
  • TSInputEncodingUTF16 split into TSInputEncodingUTF16LE and TSInputEncodingUTF16BE
    (now using UTF16LE as default for backward compatibility)
  • Cancellation flag API (ts_parser_cancellation_flag, ts_parser_set_cancellation_flag) removed
    • Parser#cancellation_flag and Parser#cancellation_flag= are now no-ops for backward compatibility
  • Timeout API (ts_parser_timeout_micros, ts_parser_set_timeout_micros) removed
    • Parser#timeout_micros and Parser#timeout_micros= are now no-ops for backward compatibility
  • Use TSParseOptions with progress_callback for cancellation/timeout functionality in 0.26+
• TREE_SITTER_LANGUAGE_VERSION is now 15 (was 14)
• TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION is now 13 (was 6)
• Grammar files (.so) must be built against tree-sitter 0.26+ to work with this version

Bug Fixes

• Fixed duplicate method definition in QueryCursor (#100 by yancya)
• Fixed a use-after-free in the logger (#100 by yancya)
• Fixed a potential buffer overflow when loading parsers.