mime-base64 Enable strict and warnings on all tests

[atoomic]

gisle/mime-base64#8

[toddr]

I have emailed gisle about a possible take over. It's not clear if he wants to continue maintaining this code.

[toddr]

@genio has taken maintenance of this module from gsile and is working on a release now.

[toddr]

his repo is here https://github.com/genio/MIME-Base64