Add EOF newlines where missing (bulk) (#1836)

This should solve issues with people making GitHub PRs and having the web editor messing things up. GitHub Web Editor sucks :(

src/pocketmine/level/generator/biome/Biome.php

@@ -192,4 +192,4 @@ abstract class Biome{
 	public function getRainfall() : float{
 		return $this->rainfall;
 	}
-}
+}

src/pocketmine/level/generator/biome/BiomeSelector.php

@@ -87,4 +87,4 @@ class BiomeSelector{
 		$biomeId = $this->map[$temperature + ($rainfall << 6)];
 		return $this->biomes[$biomeId] ?? $this->fallback;
 	}
-}
+}