Added checkstyle version to fix compatibility and changed default indent to 4

Author: R4il

build.gradle

@@ -15,6 +15,7 @@ apply plugin: 'eclipse-wtp'
 apply plugin: 'org.springframework.boot'
 apply plugin: 'checkstyle'
 checkstyle {
+	toolVersion = "8.7"
 	configFile = new File(rootDir, "checkstyle.xml")
 }
 

checkstyles.xml renamed to checkstyle.xml

@@ -162,12 +162,12 @@
                      value="GenericWhitespace ''{0}'' is not preceded with whitespace."/>
         </module>
         <module name="Indentation">
-            <property name="basicOffset" value="2"/>
+            <property name="basicOffset" value="4"/>
             <property name="braceAdjustment" value="0"/>
-            <property name="caseIndent" value="2"/>
+            <property name="caseIndent" value="4"/>
             <property name="throwsIndent" value="4"/>
             <property name="lineWrappingIndentation" value="4"/>
-            <property name="arrayInitIndent" value="2"/>
+            <property name="arrayInitIndent" value="4"/>
         </module>
         <module name="AbbreviationAsWordInName">
             <property name="ignoreFinal" value="false"/>