Make live variables optional (#36)

Author: haleybash-optimizely

OptimizelySDKCore/OptimizelySDKCore/OPTLYProjectConfig.h

@@ -46,7 +46,8 @@
 /// List of group objects
 @property (nonatomic, strong, nonnull) NSArray<OPTLYGroup> *groups;
 /// List of live variable objects
-@property (nonatomic, strong, nonnull) NSArray<OPTLYVariable> *variables;
+/// TODO: Make variables required
+@property (nonatomic, strong, nonnull) NSArray<OPTLYVariable, Optional> *variables;
 
 /// a comprehensive list of experiments that includes experiments being whitelisted (in Groups)
 @property (nonatomic, strong, nullable) NSArray<OPTLYExperiment, Ignore> *allExperiments;

OptimizelySDKCore/OptimizelySDKCore/OPTLYVariation.h

@@ -31,6 +31,7 @@
 /// The variation's Key.
 @property (nonatomic, strong) NSString *variationKey;
 /// The array containing the variation's live variable information -- variable ID and variable value.
-@property (nonatomic, strong) NSArray<NSDictionary *> *variables;
+/// TODO: Make variables required and add in NSDictionary * back into NSArray
+@property (nonatomic, strong) NSArray<Optional> *variables;
 
 @end