Update lexicon_source.bib
Update lexicon_source.bib

- This commit bumps lexicon_source.bib to the data given on [GitHub](https://github.com/lingdb/CoBL/issues/306#issuecomment-256425698).

lingdb/CoBL-public,lingdb/CoBL-public,lingdb/CoBL-public,lingdb/CoBL-public