sto build http method fixed

Visual-Regression-Tracker/Visual-Regression-Tracker#97

Author: pashidlos

src/main/java/io/visual_regression_tracker/sdk_java/VisualRegressionTracker.java

@@ -77,6 +77,7 @@ public void stop() throws IOException {
         Request request = new Request.Builder()
                 .url(this.visualRegressionTrackerConfig.getApiUrl().concat("/builds/").concat(this.buildId))
                 .addHeader(apiKeyHeaderName, this.visualRegressionTrackerConfig.getApiKey())
+                .patch(RequestBody.create("", JSON))
                 .build();
 
         client.newCall(request).execute();

src/test/java/io/visual_regression_tracker/sdk_java/VisualRegressionTrackerTest.java

@@ -153,6 +153,7 @@ public void shouldStopBuild() throws IOException, InterruptedException {
         vrt.stop();
 
         RecordedRequest request = server.takeRequest();
+        MatcherAssert.assertThat(request.getMethod(), CoreMatchers.is("PATCH"));
         MatcherAssert.assertThat(request.getHeader(vrt.apiKeyHeaderName), CoreMatchers.is(config.getApiKey()));
         MatcherAssert.assertThat(Objects.requireNonNull(request.getRequestUrl()).encodedPath(), CoreMatchers.containsString(buildId));
     }