Launch date for Starlink is wrongly set to 2019-05-01

[marcozambi]

Launch date is currently set to 2019-05-01 but the latest news are indicating 2019-05-15 @ 22:
See https://twitter.com/nextspaceflight/status/1125850141175484417 and https://twitter.com/jeff_foust/status/1125845602024161283

[jakewmeyer]

See #226

Fastest way to update launch times is through the subreddit wiki