Upgrade to npm 6.14.4
<javadoc.exec.goal>javadoc-no-fork</javadoc.exec.goal> <!-- stop initialize phase plugins executing twice -->
<frontend-version>1.7.5</frontend-version>
<node.version>10.13.0</node.version>
- <npm.version>6.8.0</npm.version>
+ <npm.version>6.14.4</npm.version>
<powermock.version>2.0.7</powermock.version>
<hamcrest.version>2.2</hamcrest.version>
<mockito.version>3.3.3</mockito.version>
