natural-mystic-shaders-1.9.0

• Updated the base code from 1.16.0 to 1.16.221.
• Implemented shaders for shader-generated sun and moon (#52). The
  moon shader does a diffuse lighting to render lunar phases.
• Added a configuration item ENABLE_SHADER_SUN_MOON which is
  enabled by default. Disabling it will revert the sun and the moon to
  the default texture-based rendering.
• The waving animation of plants used to happen even indoors. It is
  now fixed (#85).
• The waving animation of plants used to have a discontinuity at each
  of chunk borders. It is now fixed too (#85).
• The perturbance of water also significantly decreases indoors.