It needed the SWIFT_VERSION variable to be set, and for it to be set to
a version that exists on my system. I'm pasting the error over here so
maybe I google search will help a lost soul in the future -
`flutter_email_sender` does not specify a Swift version and none of the targets (`Runner`) integrating it have the `SWIFT_VERSION` attribute set. Please contact the author or set the `SWIFT_VERSION` attribute in at least one of the targets that integrate this pod.
https://github.com/sidlatau/flutter_email_sender/issues/8
The Podfile and lockfile have all changed since the dependnecies have
changed so much (because of the AndroidX update). I've had to comment
out the flutter_email_sender for now, since I just cannot seem to get
it to work, in fact, even the current build is a hit and miss.
It just seems to make a lot of changes. No idea about half of these. The
ios world is strange and foreign. I have hooked it up to Firebase
Analytics, though.
Also build on all architectures instead of just 64-bit.
