ignore the right demo directory

ignore the right demo directory

Upgrade face-landmark-detection to 3.0.0-rc.1 (tensorflow#569)

Update tfjs to 3.1.0 (tensorflow#586)

upgrade to 3.0 and udpate the link in README (tensorflow#583)

fixed the package error (tensorflow#579)

Upgrade Speech commnd to tfjs 3.0.0.rc.1 (tensorflow#572)

* upgrade speech command to 3.0.0.rc1

* fixed lint error

* udpate speech-commmand deps to 3.0.0 and bump release to 0.5.0

update deeplab to tfjs 3.0.0 (tensorflow#577)

run blazeface tests in ci (tensorflow#553)

use umd for es2017 format (tensorflow#542)