dependency: upgrade snakeyaml to 1.33

Author: Calixte

net.sf.eclipsecs.core/.classpath

@@ -8,7 +8,7 @@
 	</classpathentry>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry exported="true" kind="lib" path="lib/dom4j-2.1.3.jar"/>
-	<classpathentry exported="true" kind="lib" path="lib/snakeyaml-1.26.jar"/>
+	<classpathentry exported="true" kind="lib" path="lib/snakeyaml-1.33.jar"/>
 	<classpathentry exported="true" kind="lib" path="lib/javassist-3.28.0-GA.jar"/>
 	<classpathentry kind="lib" path="lib/checkstyle-10.4-all.jar"/>
 	<classpathentry kind="output" path="target/classes"/>

net.sf.eclipsecs.core/META-INF/MANIFEST.MF

@@ -6,7 +6,7 @@ Bundle-Version: 10.3.4.qualifier
 Bundle-RequiredExecutionEnvironment: JavaSE-11
 Bundle-ClassPath: .,
  lib/dom4j-2.1.3.jar,
- lib/snakeyaml-1.26.jar,
+ lib/snakeyaml-1.33.jar,
  lib/javassist-3.28.0-GA.jar,
  lib/checkstyle-10.4-all.jar
 Bundle-Activator: net.sf.eclipsecs.core.CheckstylePlugin

net.sf.eclipsecs.core/build.properties

@@ -7,8 +7,8 @@ bin.includes = .,\
                plugin.xml,\
                schema/,\
                core.properties,\
-               lib/dom4j-2.1.3.jar, \
-               lib/snakeyaml-1.26.jar, \
+               lib/dom4j-2.1.3.jar,\
+               lib/snakeyaml-1.33.jar,\
                lib/checkstyle-10.4-all.jar
 
 source.. = src/