Bunch of test coverage improvements

tests/test_data/layer_tests/b64_zstd/map.json

@@ -63,7 +63,7 @@
  "nextobjectid":3,
  "orientation":"orthogonal",
  "renderorder":"right-down",
- "tiledversion":"1.6.0",
+ "tiledversion":"1.8.5",
  "tileheight":32,
  "tilesets":[
         {
@@ -72,6 +72,6 @@
         }],
  "tilewidth":32,
  "type":"map",
- "version":"1.6",
+ "version":"1.8",
  "width":8
 }

tests/test_data/layer_tests/b64_zstd/map.tmx

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<map version="1.8" tiledversion="1.8.5" orientation="orthogonal" renderorder="right-down" width="8" height="6" tilewidth="32" tileheight="32" infinite="0" nextlayerid="5" nextobjectid="3">
+ <tileset firstgid="1" source="../all_layer_types/tileset.json"/>
+ <layer id="1" name="Tile Layer 1" width="8" height="6">
+  <data encoding="base64" compression="zstd">
+   KLUv/SDAZQIAAgwSDBCw3gwwDFcLT4p0Cv/c884531zzzDG/3PLKKZ9c8sghf9zxxhlfXPHEET/c8MIJH1zwwAH/7r079+3as2O/br069enSo0MBAA==
+  </data>
+ </layer>
+ <group id="4" name="Group 1">
+  <objectgroup id="2" name="Object Layer 1">
+   <object id="1" x="46.3333" y="39" width="69.3333" height="52.6667"/>
+  </objectgroup>
+ </group>
+ <imagelayer id="3" name="Image Layer 1">
+  <image source="../tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/layer_tests/tests/test_data/images/tile_04.png" trans="000000"/>
+ </imagelayer>
+</map>

tests/test_data/layer_tests/b64_zstd/tileset.json

@@ -6,9 +6,9 @@
  "name":"tile_set_image",
  "spacing":1,
  "tilecount":48,
- "tiledversion":"1.6.0",
+ "tiledversion":"1.8.5",
  "tileheight":32,
  "tilewidth":32,
  "type":"tileset",
- "version":"1.6"
+ "version":"1.8"
 }