fix client methods in biome, fixes #870

src/main/java/carpet/mixins/BiomeEffects_scarpetMixin.java

@@ -0,0 +1,53 @@
+package carpet.mixins;
+
+import carpet.fakes.BiomeEffectsInterface;
+import net.minecraft.world.biome.BiomeEffects;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Optional;
+
+@Mixin(BiomeEffects.class)
+public class BiomeEffects_scarpetMixin implements BiomeEffectsInterface
+{
+    @Shadow @Final private int fogColor;
+
+    @Shadow @Final private Optional<Integer> foliageColor;
+
+    @Shadow @Final private int skyColor;
+
+    @Shadow @Final private int waterColor;
+
+    @Shadow @Final private int waterFogColor;
+
+    @Override
+    public int getCMFogColor()
+    {
+        return fogColor;
+    }
+
+    @Override
+    public Optional<Integer> getCMFoliageColor()
+    {
+        return foliageColor;
+    }
+
+    @Override
+    public int getCMSkyColor()
+    {
+        return skyColor;
+    }
+
+    @Override
+    public int getCMWaterColor()
+    {
+        return waterColor;
+    }
+
+    @Override
+    public int getCMWaterFogColor()
+    {
+        return waterFogColor;
+    }
+}