[Cashtab + libraries] ecashjs-lib to 1.0.3 and Cashtab to latest

Summary:
T2847

ecashjs-lib was updated to have the latest dependencies installed, but references to the old ones were not corrected. This is corrected here.

This latest version of ecashjs-lib is also installed in Cashtab, so the code here can be tested.

Test Plan:

cd web/ecashjs-lib
grep -r @psf .

Only output is CHANGELOG.md

cd web/cashtab
npm start

Send an XEC tx
Send an eToken tx
Send an XEC tx with an OP_RETURN msg

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D12894