[MNG-7816] Update parent to 40, align maven requirements with those f…

…rom plugins (#1172)

Update parent to 40. Also align plugin requirements with those from parent.

This lowers plugin validation "external" warnings from 12 to 3 (site, plexus-component-metadata and rat).

---

https://issues.apache.org/jira/browse/MNG-7816

pom.xml

@@ -23,7 +23,7 @@ under the License.
  <parent>
  <groupId>org.apache.maven</groupId>
  <artifactId>maven-parent</artifactId>
- <version>39</version>
+ <version>40</version>
  <relativePath />
  </parent>
 
@@ -125,12 +125,16 @@ under the License.
 
  <properties>
  <javaVersion>8</javaVersion>
+ <minimalMavenBuildVersion>3.5.4</minimalMavenBuildVersion>
+
+ <sisuVersion>0.3.5</sisuVersion>
  <classWorldsVersion>2.7.0</classWorldsVersion>
  <commonsCliVersion>1.5.0</commonsCliVersion>
  <commonsIoVersion>2.11.0</commonsIoVersion>
  <commonsLangVersion>3.12.0</commonsLangVersion>
  <junitVersion>4.13.2</junitVersion>
  <mockitoVersion>4.11.0</mockitoVersion>
+ <!-- plexus 2.1.1 is broken, no new release exists yet (nor will exist) -->
  <plexusVersion>2.1.0</plexusVersion>
  <plexusInterpolationVersion>1.26</plexusInterpolationVersion>
  <!-- Blocked by 3.4.0+ changes, see MNG-7710 -->