[ecashaddrjs] Update readme to latest repo info

Summary:
1.1.0 has been published to npmjs and is live. On reviewing the publish page, I noticed a few issues with what is rendered generated by certain entries in the package.json and README.md. Corrected those here.

A new version needs to be published for these changes to appear live at https://www.npmjs.com/package/ecashaddrjs , so version bumped.

Test Plan: Review README and package.json changes for consistency with the truth. Verify https://unpkg.com/ecashaddrjs/dist/cashaddrjs.min.js links to a minified version.

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D13480