Update LombokConfig.getInputPaths input property to use relative path…

…s instead of absolute

Using absolute paths for this property causes the task to re-execute when the absolute paths of the inputPaths changes (if the project is moved to another directory, or the build is executed from a different path in a CI machine, for instance), even when none of the inputs have changed otherwise.

lombok-plugin/src/main/java/io/freefair/gradle/plugins/lombok/tasks/LombokConfig.java

@@ -103,7 +103,7 @@ public LombokConfig() {
     protected List<String> getInputPaths() {
         return getPaths().getFiles()
                 .stream()
-                .map(File::getPath)
+                .map(getProject()::relativePath)
                 .collect(Collectors.toList());
     }