More examples

[kalitine]

I understood better how the patterns option works only after reading the issue #1 (I used match and replace options without test and didn't understand why it was not working). I still do not understand the match option. Would be nice to have more description in the README.

[AntonioRedondo]

Definitively the docs need some brush. It's not clear at all what's the match option for.

[urbanhop]

yes, doc is urgently needed.
the words "match" and "test" in the examples are perfectly unclear and the docu is just absent.

[haqer1]

I agree with all 3 of these comments.
Started with match, had to change to test.

P.S. Puzzled about about what match option does (if it does anything). I think it might be better to just remove match from README.md; otherwise adding a clarification on what it does seems very necessary.
P.P.S. On the + side, this plugin worked out better than rollup-plugin-external-globals for what i was after (& i didn't have to do my own IO work-around, which i had kind of started to do).