#1538 - Prepare changelog for 1.3.1 release.

Author: odrotbohm

src/main/resources/changelog.txt

@@ -1,6 +1,16 @@
 Spring HATEOAS Changelog
 ========================
 
+Changes in version 1.3.1 (2021-05-12)
+----------------------------------------
+- #1533 - Upgrade to Spring 5.3.7.
+- #1532 - Add build profile for Kotlin 1.5.0 compatibility.
+- #1531 - Make WebConverters public.
+- #1524 - Provide additional HtmlInputType's for checkbox, radio and file.
+- #1522 - Cannot bootstrap HATEOAS without a default media type enabled.
+- #1519 - Handle deprecation for PropertyNamingStrategyBase.
+- #1517 - Exception on HAL serialization with object mapper configured to sort map entries by keys.
+
 Changes in version 1.3 GA (2021-04-13)
 --------------------------------------
 - #1513 - Upgrade to Jackson 2.12.3.

src/test/java/org/springframework/hateoas/support/ChangelogCreator.java

@@ -38,7 +38,7 @@
  */
 class ChangelogCreator {
 
-	private static final int MILESTONE_ID = 66;
+	private static final int MILESTONE_ID = 67;
 	private static final String URI_TEMPLATE = "https://api.github.com/repos/spring-projects/spring-hateoas/issues?milestone={id}&state=closed";
 
 	public static void main(String... args) {