chore(main): release 1.4.0 (#56)

Co-authored-by: repository-butler[bot] <166800726+repository-butler[bot]@users.noreply.github.com>

Author: repository-butler[bot]

.release-please-manifest.json

@@ -1 +1 @@
-{".":"1.3.0"}
+{".":"1.4.0"}

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.4.0](https://github.com/mpecan/upsert/compare/v1.3.0...v1.4.0) (2025-06-10)
+
+
+### Features
+
+* significantly improve test coverage and fix maintainability violations ([#55](https://github.com/mpecan/upsert/issues/55)) ([0336441](https://github.com/mpecan/upsert/commit/033644154528b923be17edadf085b13e1ecf27ea))
+
 ## [1.3.0](https://github.com/mpecan/upsert/compare/v1.2.0...v1.3.0) (2025-06-10)
 
 

gradle.properties

@@ -16,5 +16,5 @@
 # SIGNING_KEY_ID, SIGNING_PASSWORD, SIGNING_SECRET_KEY_RING_FILE for GPG signing
 # Project version - this will be updated by release-please
 #x-release-please-start-version
-version=1.3.1-SNAPSHOT
+version=1.4.0
 #x-release-please-end-version