fix sapling growth

(biome_lib requires "foo.bar" when using "quoted string" function calls)

saplings.lua

@@ -32,7 +32,7 @@ biome_lib:grow_plants({
 	grow_chance = moretrees.sapling_chance,
 	grow_plant = "moretrees:birch_sapling",
 	grow_nodes = moretrees.birch_biome.surface,
-	grow_function = "moretrees:grow_birch"
+	grow_function = "moretrees.grow_birch"
 })
 
 biome_lib:grow_plants({
@@ -40,7 +40,7 @@ biome_lib:grow_plants({
 	grow_chance = 30,
 	grow_plant = "moretrees:birch_sapling_ongen",
 	grow_nodes = moretrees.birch_biome.surface,
-	grow_function = "moretrees:grow_birch"
+	grow_function = "moretrees.grow_birch"
 })
 
 biome_lib:grow_plants({
@@ -48,7 +48,7 @@ biome_lib:grow_plants({
 	grow_chance = moretrees.sapling_chance,
 	grow_plant = "moretrees:spruce_sapling",
 	grow_nodes = moretrees.spruce_biome.surface,
-	grow_function = "moretrees:grow_spruce"
+	grow_function = "moretrees.grow_spruce"
 })
 
 biome_lib:grow_plants({
@@ -56,7 +56,7 @@ biome_lib:grow_plants({
 	grow_chance = 30,
 	grow_plant = "moretrees:spruce_sapling_ongen",
 	grow_nodes = moretrees.spruce_biome.surface,
-	grow_function = "moretrees:grow_spruce"
+	grow_function = "moretrees.grow_spruce"
 })
 
 biome_lib:grow_plants({
@@ -64,7 +64,7 @@ biome_lib:grow_plants({
 	grow_chance = moretrees.sapling_chance,
 	grow_plant = "moretrees:fir_sapling",
 	grow_nodes = moretrees.fir_biome.surface,
-	grow_function = "moretrees:grow_fir"
+	grow_function = "moretrees.grow_fir"
 })
 
 biome_lib:grow_plants({
@@ -72,7 +72,7 @@ biome_lib:grow_plants({
 	grow_chance = 30,
 	grow_plant = "moretrees:fir_sapling_ongen",
 	grow_nodes = moretrees.fir_biome.surface,
-	grow_function = "moretrees:grow_fir"
+	grow_function = "moretrees.grow_fir"
 })
 
 biome_lib:grow_plants({
@@ -80,7 +80,7 @@ biome_lib:grow_plants({
 	grow_chance = moretrees.sapling_chance,
 	grow_plant = "default:junglesapling",
 	grow_nodes = moretrees.jungletree_biome.surface,
-	grow_function = "moretrees:grow_jungletree"
+	grow_function = "moretrees.grow_jungletree"
 })
 
 biome_lib:grow_plants({
@@ -88,6 +88,6 @@ biome_lib:grow_plants({
 	grow_chance = 30,
 	grow_plant = "moretrees:jungletree_sapling_ongen",
 	grow_nodes = moretrees.jungletree_biome.surface,
-	grow_function = "moretrees:grow_jungletree"
+	grow_function = "moretrees.grow_jungletree"
 })