try fix images for windows

Signed-off-by: Stefan Niederhauser <[email protected]>

Author: nidi3

graphviz-java/src/main/java/guru/nidi/graphviz/engine/Options.java

@@ -152,7 +152,7 @@ public String toJson(boolean raw) {
         final String eng = ",engine:'" + (raw ? engine : engine.toString().toLowerCase(ENGLISH)) + "'";
         final String mem = totalMemory == null ? "" : (",totalMemory:'" + totalMemory + "'");
         final String yInv = yInvert == null ? "" : (",yInvert:" + yInvert);
-        final String base = ",basedir:'" + SystemUtils.uriPathOf(basedir.getAbsolutePath()) + "'";
+        final String base = ",basedir:'" + basedir.getAbsolutePath() + "'";
         final String imgs = ",images:[" + images.stream().map(Image::toJson).collect(joining(",")) + "]";
         return "{" + form + eng + mem + yInv + base + imgs + "}";
     }

graphviz-java/src/test/java/guru/nidi/graphviz/engine/OptionsTest.java

@@ -83,7 +83,7 @@ void toJsonOneImage() {
     @Test
     void toJsonTwoImages() {
         final String s = Options.create().engine(Engine.DOT).format(Format.PNG).basedir(new File("example")).image("ex1.png").image("ex2.png").toJson(false);
-        assertEquals("{format:'svg',engine:'dot',basedir:'" + uriPathOf(new File("example")) + "',images:["
+        assertEquals("{format:'svg',engine:'dot',basedir:'" + new File("example").getAbsolutePath() + "',images:["
                 + "{path:'" + uriPathOf(new File("example/ex1.png")) + "',width:'547px',height:'100px'},"
                 + "{path:'" + uriPathOf(new File("example/ex2.png")) + "',width:'900px',height:'962px'}]}", s);
     }