Merge branch 'mkirk/planet-v1.55'

update deps

Merge branch 'mkirk/planet-1.49'

update deps

Merge pull request #356 from headwaymaps/mkirk/ios-universal-links

Allow universal links for iOS native app

[travelmux] compute bearing between steps

Merge pull request #353 - [travelmux] /directions api for navigation UI

[travelmux] /directions api for navigation UI

Merge pull request #352 from headwaymaps/mkirk/update-valhalla

update valhalla

Merge pull request #351 from headwaymaps/mkirk/otp-bike

Include better OTP results in walk/bike directions when available.

[travelmux] OTP's absolute_direction is optional (#349)