Update CHANGELOG-VAADIN7.md

CHANGELOG-VAADIN7.md

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 # Vaadin 7 extended maintenance version changelog
 
+## Vaadin 7.7.34
+
+* Update Jsoup to version 1.15.3
+
+
+## Vaadin 7.7.33
+
+* Update license metainfo CVDL4 
+* Update Jetty version for security
+* Update license checker to version 1.5.2
+
+
+## Vaadin 7.7.32
+
+* Update Atmosphere version to 2.2.13.vaadin4
+
+## Vaadin 7.7.31
+
+* Don't serve directories as static files
+* Update license checker version to 1.2.2
+* Add JNA dependencies for license checker
+
 ## Vaadin 7.7.30
 
 * Ensure resize and dragging curtains are removed when a window is closed