Bump frontend-maven-plugin from 1.10.3 to 1.10.4 (#378)

Bumps [frontend-maven-plugin](https://github.com/eirslett/frontend-maven-plugin) from 1.10.3 to 1.10.4.
- [Release notes](https://github.com/eirslett/frontend-maven-plugin/releases)
- [Changelog](https://github.com/eirslett/frontend-maven-plugin/blob/master/CHANGELOG.md)
- [Commits](eirslett/frontend-maven-plugin@frontend-plugins-1.10.3...frontend-plugins-1.10.4)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -77,7 +77,7 @@
     <node.version>4.0.0</node.version>
     <npm.version>2.13.1</npm.version>
     <yarn.version>0.23.0</yarn.version>
-    <frontend-version>1.10.3</frontend-version>
+    <frontend-version>1.10.4</frontend-version>
     <skip.node.tests /> <!-- changed by -DskipTests, if specified - see profile -->
     <skip.node.lint /> <!-- changed by -DskipLint, if specified - see profile -->
     <npm.loglevel /> <!-- may use e.g. -\-silent (without backslash) -->