Simple datapack that:
1) changes the color of grass in Dappled Forests to warm olive green, leaving foliage default orange color 
2) makes tree generation denser and fallen logs rarer
3) adds pumpkin patches, regular and sweet berry bushes
4) removes surface lava lakes and streams

Note: The grass category includes grass blocks, short and tall grass, sugar cane and regular bushes, and foliage category - leaves and vines.