v1.5.4

Description

This release is required to support Xcode 14.3.

Compiling on Xcode 14.3 (using pod lib lint) was failing with this error:

ld: file not found: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/arc/libarclite_iphonesimulator.a

According to this StackOverflow post, we need to bump the minimum iOS deployment version.

Hence this version bump contains the following changes:

• Updates min deployment version to iOS 12
• Limits the podspec support to just iOS, as tvOS and watchOS simulators are optional with the newer Xcode releases, which also causes pod lib lint to fail.
• Bumps the version to 1.5.4, to prevent any conflicts with the open source swiftprotobuf repo