Bump version.elemental2 from 1.1.0 to 1.2.0

Bumps `version.elemental2` from 1.1.0 to 1.2.0.

Updates `com.google.elemental2:elemental2-core` from 1.1.0 to 1.2.0
- [Release notes](https://github.com/google/elemental2/releases)
- [Commits](google/elemental2@1.1.0...1.2.0)

Updates `com.google.elemental2:elemental2-dom` from 1.1.0 to 1.2.0
- [Release notes](https://github.com/google/elemental2/releases)
- [Commits](google/elemental2@1.1.0...1.2.0)

Updates `com.google.elemental2:elemental2-webstorage` from 1.1.0 to 1.2.0
- [Release notes](https://github.com/google/elemental2/releases)
- [Commits](google/elemental2@1.1.0...1.2.0)

---
updated-dependencies:
- dependency-name: com.google.elemental2:elemental2-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.elemental2:elemental2-dom
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.elemental2:elemental2-webstorage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -96,7 +96,7 @@
     <properties>
         <!-- Dependency versions -->
         <version.checkstyle.config>1.0.8.Final</version.checkstyle.config>
-        <version.elemental2>1.1.0</version.elemental2>
+        <version.elemental2>1.2.0</version.elemental2>
         <version.gwt.event>1.0.0-RC1</version.gwt.event>
         <version.gwt.safehtml>1.0.0-RC1</version.gwt.safehtml>
         <version.junit>5.10.0</version.junit>