Remove lineSeparator LF requirement

Update checkstyle rules so that the `NewlineAtEndOfFile` check no
longer enforces only LF line separators. The default now accepts
LF, CR or CRLF.

Closes gh-202

Author: philwebb

spring-javaformat/spring-javaformat-checkstyle/src/main/java/io/spring/javaformat/checkstyle/check/SpringAvoidStaticImportCheck.java

@@ -26,6 +26,8 @@
 
 /**
  * Spring variant of {@link AvoidStarImportCheck}.
+ *
+ * @author Phillip Webb
  */
 public class SpringAvoidStaticImportCheck extends AvoidStaticImportCheck {
 

spring-javaformat/spring-javaformat-checkstyle/src/main/resources/io/spring/javaformat/checkstyle/spring-checkstyle.xml

@@ -11,9 +11,7 @@
 		<property name="headerFile" value="${headerFile}" default=""/>
 		<property name="headerCopyrightPattern" value="${headerCopyrightPattern}"/>
 	</module>
-	<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck">
-		<property name="lineSeparator" value="lf"/>
-	</module>
+	<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck" />
 
 	<!-- TreeWalker Checks -->
 	<module name="com.puppycrawl.tools.checkstyle.TreeWalker">

src/checkstyle/checkstyle.xml

@@ -8,9 +8,7 @@
 		<property name="headerFile" value="${checkstyle.header.file}" />
 		<property name="fileExtensions" value="java" />
 	</module>
-	<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck">
-		<property name="lineSeparator" value="lf"/>
-	</module>
+	<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck" />
 
 	<!-- TreeWalker Checks -->
 	<module name="com.puppycrawl.tools.checkstyle.TreeWalker">