Upgrade to JTS 1.17.0. (#188)

Signed-off-by: Jim Hughes <[email protected]>

Author: jnh5y

CHANGES.md

@@ -2,6 +2,9 @@
 
 DATE: _unreleased_
 
+* \#188: Upgraded to JTS 1.17.0.  This JTS release has a small [API change](https://github.com/locationtech/jts/blob/master/doc/JTS_Version_History.md#api-changes).  
+  (Jim Hughes)
+
 * \#177: Improve conversion of a Circle to Shape. JtsShapeFactory allows converting from a Shape
   object to a JTS Geometry object. Geodetic circles now translate to a polygon that has points
   equidistant from the center. Before the change, there was potentially a large inaccuracy.

pom.xml

@@ -121,7 +121,7 @@
     <dependency>
       <groupId>org.locationtech.jts</groupId>
       <artifactId>jts-core</artifactId>
-      <version>1.15.0</version>
+      <version>1.17.0</version>
       <optional>true</optional>
     </dependency>
 

src/test/java/org/locationtech/spatial4j/context/jts/JtsSpatialContextTest.java

@@ -30,7 +30,7 @@ public void testDatelineRule() {
         JtsSpatialContextFactory factory = new JtsSpatialContextFactory();
         factory.datelineRule = DatelineRule.width180;
         JtsSpatialContext ctx = factory.newSpatialContext();
-        final Polygon polygonCloned = polygon.copy();
+        final Polygon polygonCloned = (Polygon) polygon.copy();
         JtsGeometry shp = ctx.makeShape(polygonCloned);
         assertEquals("shouldn't be modified after calling makeShape", polygon, polygonCloned);
         assertTrue(shp.getGeom() instanceof GeometryCollection);