Fix the broken parts of the test.

Author: nedtwigg

testlib/src/test/java/com/diffplug/spotless/kotlin/KtfmtStepTest.java

@@ -32,23 +32,17 @@ void dropboxStyle_0_18() throws Exception {
 		StepHarness.forStep(step).testResource("kotlin/ktfmt/basic.dirty", "kotlin/ktfmt/basic-dropboxstyle.clean");
 	}
 
-	@Test
-	void dropboxStyle_0_19() throws Exception {
-		FormatterStep step = KtfmtStep.create("0.19", TestProvisioner.mavenCentral(), KtfmtStep.Style.DROPBOX, null);
-		StepHarness.forStep(step).testResource("kotlin/ktfmt/basic.dirty", "kotlin/ktfmt/basic-dropboxstyle.clean");
-	}
-
 	@Test
 	void equality() throws Exception {
 		new SerializableEqualityTester() {
-			String version = "0.13";
+			String version = "0.18";
 
 			@Override
 			protected void setupTest(API api) {
 				// same version == same
 				api.areDifferentThan();
 				// change the version, and it's different
-				version = "0.12";
+				version = KtfmtStep.defaultVersion();
 				api.areDifferentThan();
 			}