Update Checkstyle DTD version from 1.0 to 1.2
diff --git a/checkstyle-suppressions.xml b/checkstyle-suppressions.xml
index 0df0ba9..285e1d3 100755
--- a/checkstyle-suppressions.xml
+++ b/checkstyle-suppressions.xml
@@ -1,7 +1,4 @@
 <?xml version="1.0"?>
-<!DOCTYPE suppressions PUBLIC
-        "-//Checkstyle//DTD SuppressionFilter Configuration 1.0//EN"
-        "https://checkstyle.org/dtds/suppressions_1_0.dtd">
 <!--
    Licensed to the Apache Software Foundation (ASF) under one or more
    contributor license agreements.  See the NOTICE file distributed with
@@ -9,31 +6,34 @@
    The ASF licenses this file to You under the Apache License, Version 2.0
    (the "License"); 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
+
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
+<!DOCTYPE suppressions PUBLIC
+    "-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
+    "https://checkstyle.org/dtds/suppressions_1_2.dtd">
 <suppressions>
-    <suppress checks="AvoidInlineConditionals" files=".+\.java" lines="0-99999" />
-    <suppress checks="FinalParameters" files=".+\.java" lines="0-99999" />
-    <suppress checks="HiddenField" files=".+\.java" lines="0-99999" />
-    <suppress checks="DesignForExtension" files=".+\.java" lines="0-99999" />
-    <suppress checks="HideUtilityClassConstructor" files=".+\.java" lines="0-99999" />
-    <suppress checks="VisibilityModifier" files=".+\.java" lines="0-99999" />
-
-    <suppress checks="MagicNumber" files=".*[/\\]test[/\\].*" />
-    <suppress checks="MethodName" files=".*[/\\]test[/\\].*" />
-    <suppress checks="Javadoc" files=".*[/\\]test[/\\].*" />
-
-    <suppress checks="LineLength" files=".*CommonsDistributionDetachmentMojoTest.java" />
-    <suppress checks="LineLength" files=".*CommonsDistributionStagingMojoTest.java" />
-    <suppress checks="LineLength" files="target[/\\]testing-commons-release-plugin[/\\]sha512.properties" />
-    <suppress checks="LineLength" files="target[/\\]commons-release-plugin[/\\]sha512.properties" />
-    <suppress checks="FinalClassCheck" files=".*Delegate.java" />
-    <!-- Don't complain when generated on Windows -->
-    <suppress checks="NewlineAtEndOfFile" files="target\\maven-archiver\\pom.properties" />
-    <suppress checks="NewlineAtEndOfFile" files="target\\testing-commons-release-plugin\\sha512.properties" />
-</suppressions>
\ No newline at end of file
+  <suppress checks="AvoidInlineConditionals" files=".+\.java" lines="0-99999" />
+  <suppress checks="FinalParameters" files=".+\.java" lines="0-99999" />
+  <suppress checks="HiddenField" files=".+\.java" lines="0-99999" />
+  <suppress checks="DesignForExtension" files=".+\.java" lines="0-99999" />
+  <suppress checks="HideUtilityClassConstructor" files=".+\.java" lines="0-99999" />
+  <suppress checks="VisibilityModifier" files=".+\.java" lines="0-99999" />
+  <suppress checks="MagicNumber" files=".*[/\\]test[/\\].*" />
+  <suppress checks="MethodName" files=".*[/\\]test[/\\].*" />
+  <suppress checks="Javadoc" files=".*[/\\]test[/\\].*" />
+  <suppress checks="LineLength" files=".*CommonsDistributionDetachmentMojoTest.java" />
+  <suppress checks="LineLength" files=".*CommonsDistributionStagingMojoTest.java" />
+  <suppress checks="LineLength" files="target[/\\]testing-commons-release-plugin[/\\]sha512.properties" />
+  <suppress checks="LineLength" files="target[/\\]commons-release-plugin[/\\]sha512.properties" />
+  <suppress checks="FinalClassCheck" files=".*Delegate.java" />
+  <!-- Don't complain when generated on Windows -->
+  <suppress checks="NewlineAtEndOfFile" files="target\\maven-archiver\\pom.properties" />
+  <suppress checks="NewlineAtEndOfFile" files="target\\testing-commons-release-plugin\\sha512.properties" />
+</suppressions>