Bump ktlint default version from 0.46.1 to 0.47.1

Author: nedtwigg

lib/src/main/java/com/diffplug/spotless/kotlin/KtLintStep.java

@@ -33,7 +33,7 @@ public class KtLintStep {
 	// prevent direct instantiation
 	private KtLintStep() {}
 
-	private static final String DEFAULT_VERSION = "0.46.1";
+	private static final String DEFAULT_VERSION = "0.47.1";
 	static final String NAME = "ktlint";
 	static final String PACKAGE_PRE_0_32 = "com.github.shyiko";
 	static final String PACKAGE = "com.pinterest";