fix: don't hard fail when serializing failed

[hannojg]

In my project scenario this case failed for me. It was trying to serialise a string/uuid:

[Malformed Xcode project]: Found orphaned reference: 79332038C44045AD94B3A9FB > PBXTargetDependency.targetProxy > 68D8C8772B28CFF300FF65DB
[Malformed Xcode project]: Found orphaned reference: 096AE6AA28DE43C8996B60E0 > PBXTargetDependency.targetProxy > 68D8C8782B28CFF300FF65DB
[Malformed Xcode project]: Found orphaned reference: E408E5530DA04F7487D5646D > PBXTargetDependency.targetProxy > 68D8C8792B28CFF300FF65DB
[Malformed Xcode project]: Found orphaned reference: EE6CD26D29074DF499E3D6D6 > PBXTargetDependency.targetProxy > F186507EA3414BFCB686D489
[Malformed Xcode project]: Found orphaned reference: 241EA4F9F32C4ED7930D0229 > PBXTargetDependency.targetProxy > 09A87CA44CFA41E3BEDA4063
[Malformed Xcode project]: Found orphaned reference: 13B07F861A680F5B00A75B9A > PBXNativeTarget.buildPhases > 318C3A8FB1A0467E8F8B864D

✖ Config sync failed

Error: [ios.xcodeProjectBeta]: withIosXcodeProjectBetaBaseMod: Unable to serialize object: '68D8C8772B28CFF300FF65DB'

Instead of failing I just thought we could return a warning here?
However, I understand that It might be better to find the root cause why its failing.

[kirillzyusko]

Just for a better context what exactly fails. If we change logger to:

console.warn(util_1.default.format("Unable to serialize object: %O", value, key, this.props));

Then failed output looks like:

Unable to serialize object: 'C2AF0FB572684A1887E54D96' targetProxy {
  isa: 'PBXTargetDependency',
  target: PBXNativeTarget {
    uuid: '071838C5188B4ECC98F296EF',
    props: {
      isa: 'PBXNativeTarget',
      name: 'Shortcuts',
      productName: 'Shortcuts',
      productReference: [PBXFileReference],
      productType: 'com.apple.product-type.app-extension',
      buildConfigurationList: [XCConfigurationList],
      buildPhases: [Array],
      buildRules: [],
      dependencies: []
    }
  },
  targetProxy: 'C2AF0FB572684A1887E54D96'
}

Still investigating why key: string is not a valid construction 👀

[EvanBacon]

Could I get a repro object to test against?