Several updates to site generation

 - Update site plugin to remove NoSuchMethodError
 - Use Maven Fluido Skin, the only skin mainained by the Maven project.
 - Replace various links with HTTPS

Author: froque

README.md

@@ -33,7 +33,7 @@ Currently, you need Maven 3.x & JDK 8 to build the plugin, create the site, and
   * `./mvnw release:clean && ./mvnw release:prepare && ./mvnw release:perform` : to publish on staging repository via plugin
   * `./mvnw release:clean && ./mvnw release:prepare -Darguments="-DskipTests -Dmaven.test.skip=true" && ./mvnw release:perform -Darguments="-DskipTests -Dmaven.test.skip=true"` to publish without tests (integration test require 30min on CI)
   * `./mvnw site package source:jar javadoc:jar install:install gpg:sign deploy:deploy changes:announcement-generate -Dmaven.test.skip=true -DperformRelease=true` : manual
-  * connect to <http://oss.sonatype.org/> close and release the request(about scala-maven-plugin) in staging repositories
+  * connect to <https://oss.sonatype.org/> close and release the request(about scala-maven-plugin) in staging repositories
   * browse the updated [mvnsite](https://davidb.github.io/scala-maven-plugin/) (check version into samples, ...)
 
 ## TODO

UNLICENSE

@@ -21,4 +21,4 @@ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 
-For more information, please refer to <http://unlicense.org/>
+For more information, please refer to <https://unlicense.org/>

pom.xml

@@ -7,12 +7,12 @@
 
   <name>scala-maven-plugin</name>
   <description>The scala-maven-plugin (previously maven-scala-plugin) is used for compiling/testing/running/documenting scala code of any maven project.</description>
-  <url>http://github.com/davidB/${project.artifactId}</url>
+  <url>https://github.com/davidB/${project.artifactId}</url>
   <inceptionYear>2012</inceptionYear>
   <licenses>
     <license>
       <name>Public domain (Unlicense)</name>
-      <url>http://unlicense.org/</url>
+      <url>https://unlicense.org/</url>
       <distribution>repo</distribution>
     </license>
   </licenses>
@@ -96,21 +96,21 @@
   <mailingLists>
     <mailingList>
       <name>maven-and-scala</name>
-      <archive>http://groups.google.com/group/maven-and-scala</archive>
-      <post>http://groups.google.com/group/maven-and-scala</post>
+      <archive>https://groups.google.com/group/maven-and-scala</archive>
+      <post>https://groups.google.com/group/maven-and-scala</post>
     </mailingList>
   </mailingLists>
 
   <scm>
     <connection>scm:git:git://github.com/davidB/${project.artifactId}.git</connection>
     <developerConnection>scm:git:git@github.com:davidB/${project.artifactId}.git</developerConnection>
-    <url>http://github.com/davidB/${project.artifactId}/</url>
+    <url>https://github.com/davidB/${project.artifactId}/</url>
     <tag>HEAD</tag>
   </scm>
 
   <issueManagement>
     <system>github</system>
-    <url>http://github.com/davidB/${project.artifactId}/issues#issue/</url>
+    <url>https://github.com/davidB/${project.artifactId}/issues#issue/</url>
   </issueManagement>
 
   <distributionManagement>
@@ -410,7 +410,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-site-plugin</artifactId>
-          <version>3.12.1</version>
+          <version>3.21.0</version>
         </plugin>
         <plugin>
           <artifactId>maven-source-plugin</artifactId>

src/main/java/scala_maven/ScalaCompilerLoader.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *  http://www.apache.org/licenses/LICENSE-2.0
+ *  https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,

src/main/java/scala_maven/ScalaDocJarMojo.java

@@ -67,7 +67,7 @@ public class ScalaDocJarMojo extends ScalaDocMojo {
 
   /**
    * The archive configuration to use. See <a
-   * href="http://maven.apache.org/shared/maven-archiver/index.html">Maven Archiver Reference</a>.
+   * href="https://maven.apache.org/shared/maven-archiver/index.html">Maven Archiver Reference</a>.
    */
   @Parameter private MavenArchiveConfiguration archive = new MavenArchiveConfiguration();