version 0.20.0-rc1

[0.20.0-rc] Bump version numbers

[0.19.0] Bump version numbers

[0.19.0-rc] Bump version numbers

Revert "Dont call npm before node is available"

This reverts commit 7ecb693.

This breaks Xcode build, see discussion on facebook#5156

[0.18.0-rc] Bump version numbers

[0.17.0] Bump version numbers

Make the NetInfoModule not crash when permission is missing

Depend on 0.16.1 binaries from custom JCenter repo

Only needed until the artifacts propagate to Maven Central.

[0.16.0-rc] Bump version numbers