• Raise the minimum versions of Raqm dependencies: no longer conditionally enabling any features based on specific dependency version.
• raqm_t objects can now be reused by calling raqm_clear_contents() before re-use, to potentially reduce the number memory allocations.
• Don't hardcode python3 in tests.
• New API:
  • raqm_set_freetype_load_flags_range()
  • raqm_clear_contents()