Enhanced performance base64 package

Published a major update to isomorphic base64 package fpr Meteor.js.

Breaking Changes:

• Compatible only with [email protected] and newer;
• Now only Base64 class is exported. Please, see updated documentation;
• allowWebWorker is false by default now;
• useNative is false on the Client, and true on the Server by default now.

Other:

• 👩‍🔬 Update test-suite;
• 🤝 Compatibility with latest [email protected] and [email protected].

Detailed change log