chore: make browser.newPage device-friendly (microsoft#203)

chore: roll Playwright to 1.4.2 (microsoft#200)

devops: fixed docs deployment (microsoft#187)

docs: updated readme.

fix: stderr redirect with monkeypatched stderr (microsoft#159)

tests: added browser tests (microsoft#153)

tests: added keyboard tests (microsoft#146)

test: add async dispatch event tests (microsoft#130)

feat(docs): validate doc parameters, report errors (microsoft#104)