chore: mark version v1.9.0 (puppeteer#3350)

chore: mark version v1.8.0 (puppeteer#3211)

chore: mark version v1.7.0 (puppeteer#3059)

chore: mark version v1.6.2

chore: mark version v1.6.1

chore: mark version v1.6.0 (puppeteer#2882)

chore: mark version v1.5.0 (puppeteer#2698)

chore: mark version v1.4.0 (puppeteer#2517)

docs(api.md): fix docs/api.md (puppeteer#2370)

v1.3.0 **is** released.

chore: mark version v1.2.0 (puppeteer#2204)