Exception thrown when adding first todo item

[chrisbward]

Please add some tests, nothing should be broken in this demo.

Unhandled Rejection (PreconditionFailedError): Error when uploading to Gaia hub.
If you believe this exception is caused by a bug in blockstack.js,
      please file a bug report: https://github.com/blockstack/blockstack.js/issues

Error Code: precondition_failed_errorStack Trace:
Wrapper@http://localhost:3000/static/js/0.chunk.js:14572:14
BlockstackError@http://localhost:3000/static/js/0.chunk.js:14704:20
GaiaHubError@http://localhost:3000/static/js/0.chunk.js:14964:34
PreconditionFailedError@http://localhost:3000/static/js/0.chunk.js:15094:30
_callee6$@http://localhost:3000/static/js/0.chunk.js:34900:47
tryCatch@http://localhost:3000/static/js/0.chunk.js:35033:19
invoke@http://localhost:3000/static/js/0.chunk.js:35250:32
./node_modules/@stacks/storage/dist/node_modules/regenerator-runtime/runtime.esm.js/runtime_1</defineIteratorMethods/</<@http://localhost:3000/static/js/0.chunk.js:35086:23
asyncGeneratorStep@http://localhost:3000/static/js/0.chunk.js:34275:24
_next@http://localhost:3000/static/js/0.chunk.js:34297:27

[chrisbward]

referencing another ticket that has been open for over a year;
#63