Updated version to 0.5 to match with PySyft and PyGrid

[mjjimenez]

Description

Updated podspec to reflect new version 0.5

Checklist

• [x] I have followed the Contribution Guidelines and Code of Conduct
• [x] I have commented my code following the OpenMined Styleguide
• [x] I have labeled this PR with the relevant Type labels
• [x] My changes are covered by tests

[codecov[bot]]

Codecov Report

Merging #218 (e742d24) into dev (5430754) will decrease coverage by 18.20%. The diff coverage is 7.83%.

@@             Coverage Diff             @@
##              dev     #218       +/-   ##
===========================================
- Coverage   52.97%   34.76%   -18.21%     
===========================================
  Files          16       25        +9     
  Lines        1882     2646      +764     
  Branches        0     1009     +1009     
===========================================
- Hits          997      920       -77     
- Misses        885     1691      +806     
- Partials        0       35       +35     

Impacted Files	Coverage Δ
SwiftSyft/Classes/LazyDataLoader.swift	0.00% <0.00%> (ø)
SwiftSyft/Classes/SignallingMessages.swift	31.02% <0.00%> (-4.02%)	:arrow_down:
SwiftSyft/Classes/SyftModel.swift	0.00% <0.00%> (ø)
SwiftSyft/Classes/SyftPlan.swift	0.00% <0.00%> (-7.55%)	:arrow_down:
SwiftSyft/Classes/SyftProtoExtensions.swift	0.00% <0.00%> (ø)
SwiftSyft/Classes/TorchWrapper/src/TorchIValue.mm	0.00% <0.00%> (ø)
SwiftSyft/Classes/TorchWrapper/src/TorchModule.mm	0.00% <0.00%> (ø)
SwiftSyft/Classes/TorchWrapper/src/TorchTensor.mm	0.00% <0.00%> (ø)
SwiftSyft/Extensions/CombineExtensions.swift	0.00% <0.00%> (ø)
SwiftSyft/Extensions/TorchExtensions.swift	0.00% <0.00%> (ø)
... and 28 more

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