Merge branch 'master' into 1.15

# Conflicts:
#	src/main/java/carpet/fakes/StructureFeatureInterface.java
#	src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java

src/main/java/carpet/script/value/BlockValue.java

@@ -36,8 +36,8 @@ public class BlockValue extends Value
     public static final BlockValue AIR = new BlockValue(Blocks.AIR.getDefaultState(), null, BlockPos.ORIGIN);
     public static final BlockValue NULL = new BlockValue(null, null, null);
     private BlockState blockState;
-    private BlockPos pos;
-    private ServerWorld world;
+    private final BlockPos pos;
+    private final ServerWorld world;
     private CompoundTag data;
 
     public static BlockValue fromCoords(CarpetContext c, int x, int y, int z)
@@ -46,7 +46,7 @@ public class BlockValue extends Value
         return new BlockValue(null, c.s.getWorld(), pos);
     }
 
-    private static Map<String, BlockValue> bvCache= new HashMap<>();
+    private static final Map<String, BlockValue> bvCache= new HashMap<>();
     public static BlockValue fromString(String str)
     {
         try
@@ -294,8 +294,8 @@ public class BlockValue extends Value
 
     public static class LocatorResult
     {
-        public BlockValue block;
-        public int offset;
+        public final BlockValue block;
+        public final int offset;
         LocatorResult(BlockValue b, int o)
         {
             block = b;
@@ -306,9 +306,9 @@ public class BlockValue extends Value
     public static class VectorLocator
     {
         public Vec3d vec;
-        public int offset;
-        public double yaw;
-        public double pitch;
+        public final int offset;
+        public final double yaw;
+        public final double pitch;
         public boolean fromBlock;
         VectorLocator(Vec3d v, int o)
         {
@@ -358,9 +358,9 @@ public class BlockValue extends Value
         EASTUP("east-up", 0.0, 0.6, 0.5, Direction.EAST),
         WESTUP("west-up", 1.0, 0.6, 0.5, Direction.WEST);
 
-        public String name;
-        public Vec3d hitOffset;
-        public Direction facing;
+        public final String name;
+        public final Vec3d hitOffset;
+        public final Direction facing;
 
         private static final Map<String, SpecificDirection> DIRECTION_MAP = Arrays.stream(values()).collect(Collectors.toMap(SpecificDirection::getName, d -> d));