Post-release of v8.1.3 by @rtyley: set snapshot version

gu-scala-library-release[bot] · web-flow · commit 8c51e90cd4ce · 2025-05-29T10:14:05.000Z
Setting snapshot version after @rtyley published https://github.com/guardian/etag-caching/releases/tag/v8.1.3
diff --git a/version.sbt b/version.sbt
@@ -1 +1 @@
-ThisBuild / version := "8.1.3"
+ThisBuild / version := "8.1.4-SNAPSHOT"
