Update for yFiles for HTML 2.5.0.2

Author: michabaur

.gitignore

@@ -23,3 +23,4 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 package-lock.json
+yarn.lock

integration-howto.md

@@ -20,7 +20,7 @@ Adding yFiles as a dependency is almost as easy as installing an external librar
    ```
    "dependencies": {
      ...
-     "yfiles": "../yFiles-for-HTML-Complete-2.5-Evaluation/lib-dev/yfiles-25.0.1+eval-dev.tgz"
+     "yfiles": "../yFiles-for-HTML-Complete-2.5.0.2-Evaluation/lib-dev/yfiles-25.0.2+eval-dev.tgz"
    },
    ```