LeftCurly FormatterSettings missing for LAMBDA

Hi,

I use the actual checkstyle plugin (version 8.12.0.201808161509).
It seems, that the transformer to codeformatter does not support the token "LAMBDA".
No errors in Eclipse message log.
The expression will simply be ignored while creating the formatter.

In the code itsself, the curly bracket is marked as wrong formatted. So, this function works correct.

If I'm correct, the following code is missing in the [eclipse-cs/net.sf.eclipsecs.core/src/net/sf/eclipsecs/core/transformer/ctransformerclasses/LeftCurlyTransformer.java](https://github.com/checkstyle/eclipse-cs/blob/master/net.sf.eclipsecs.core/src/net/sf/eclipsecs/core/transformer/ctransformerclasses/LeftCurlyTransformer.java#L55) (Line 77):
` } else if (tok.equals("LAMBDA")) {
userFormatterSetting("brace_position_for_lambda_body", option);
}`

I'm using Eclipse Oxygen.3a (Release 4.7.3a)