In order to make search more powerful, adding the ability to change the lunr.tokenizer.seperator would be nice.

https://github.com/olivernn/lunr.js/blob/master/lib/tokenizer.js#L69-L76

Out of the box, if you have the string:
this.test

The query test will return empty, but this.t will return this.test.

By changing the regex used for tokenization, you could solve problems like this