v1.2

Full Changelog: v1.1...v1.2

• Generates the instance at runtime, which avoids adding megabytes of packed arrays to your .tscn files.
• Shader parameters no longer need "make unique" to edit.
• distance_limit has been replaced with luminosity_cap for better behavior with very bright stars.
• StarGenerator is no longer used by default in Stars.tscn.
• scaling_gamma allows tighter bounds on PSF cropping.
• color_gamma allows adjusting how colorful the stars are.