Preserve external sources on locked dependencies in the resolver

[Bundle] Update Xcodeproj

nowhere is one word

(Not so) Small performance improvements

Add set -u to frameworks and resources copy scripts

This way, CocoaPods does not have to make assumptions about when to copy things, as the user can then set FRAMEWORKS_FOLDER_PATH / UNLOCALIZED_RESOURCES_FOLDER_PATH for static library targets

This is an optional variable

This variable isn't set by Xcode when running this script.

This case statement handles different iOS device families, for macOS
builds this build setting isn't set.

Turns out that bash arrays are not initialized until they have a single
item. This means this variable is treated as unbound until we add an
item to it. By defaulting this to nothing, this check succeeds even if
no items are ever added to the array.

This is required for `set -u` to work since this variable isn't required
to be set.

This adds `set -u` to both the frameworks and resources copy shell
scripts. This means that if the scripts attempt to reference any
variable that is undefined, they will fail.

[Sandbox] Clean up usage of #local?

Only add resources and frameworks build phase when needed

A recent version of git has changed what whitespace it outputs