MLIBZ-2095: bugfix for the infinite loop if dynamic keyword is not used

[heyzooi]

Description

Bugfix for the infinite loop in case the user forgets to add the dynamic keyword in the property

Changes

• Fixing the ObjCRuntime class to not get stucked in a infinite loop in case the property does not have a dynamic keyword

Tests

• Since this is a infinite loop it's hard to find a way to write a unit test for it

[codecov-io]

Codecov Report

Merging #243 into develop will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           develop    #243      +/-   ##
==========================================
+ Coverage    90.37%   90.4%   +0.03%     
==========================================
  Files           65      65              
  Lines         7976    7976              
==========================================
+ Hits          7208    7211       +3     
+ Misses         768     765       -3

Flag	Coverage Δ
#Mac	87.69% <ø> (ø)	⬆️
#iOS	89.3% <ø> (+0.03%)	⬆️

Impacted Files	Coverage Δ
Kinvey/Kinvey/Kinvey.swift	100% <0%> (+0.77%)	⬆️
Kinvey/Kinvey/Client.swift	92.57% <0%> (+0.99%)	⬆️

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[heyzooi]

the fix itself was included during our Swift 4 migration.
Here's the fix: c5c23df#diff-b6fd1f03d32320489ca9966c5f370602R86

[tejasranade]

LGTM