Update dependency org.projectlombok:lombok to v1.18.28

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [org.projectlombok:lombok](https://projectlombok.org) ([source](https://github.com/projectlombok/lombok)) | dependencies | patch | `1.18.10` -> `1.18.28` |

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gradle/dependencies.gradle

@@ -27,7 +27,7 @@ ext {
 
   libraries = [
     // lombok
-    lombok: 'org.projectlombok:lombok:1.18.10',
+    lombok: 'org.projectlombok:lombok:1.18.28',
 
     // servlet api
     servletApi: 'javax.servlet:javax.servlet-api:3.1.0',