Shared state

[Jojo-1000]

The Bridge can be given an additional shared state flag. If present, all resources on the bridge use the same json state internally. Otherwise, every object uses a separate json cache.

Advantages of shared state:

• Different resources are always consistent on the library level
• Possibly reduces the number of requests necessary

Disadvantages:

• Different objects are no longer thread safe, you cannot use any parts of the library from multiple threads
• Changes are not transparent, e.g. a const Light may suddenly change its name

[codecov[bot]]

Codecov Report

Merging #67 (bd6ac26) into development (2b776fa) will decrease coverage by 0.18%. The diff coverage is 90.10%.

@@               Coverage Diff               @@
##           development      #67      +/-   ##
===============================================
- Coverage        83.40%   83.22%   -0.19%     
===============================================
  Files              100      100              
  Lines             8724     8707      -17     
===============================================
- Hits              7276     7246      -30     
- Misses            1448     1461      +13     

Impacted Files	Coverage Δ
include/hueplusplus/APICache.h	100.00% <ø> (ø)
include/hueplusplus/BaseDevice.h	100.00% <ø> (ø)
include/hueplusplus/Bridge.h	100.00% <ø> (ø)
include/hueplusplus/BridgeConfig.h	100.00% <ø> (ø)
include/hueplusplus/Group.h	100.00% <ø> (ø)
include/hueplusplus/HueDeviceTypes.h	100.00% <ø> (ø)
include/hueplusplus/Light.h	96.62% <ø> (+10.11%)	:arrow_up:
include/hueplusplus/Rule.h	100.00% <ø> (ø)
include/hueplusplus/Scene.h	100.00% <ø> (ø)
include/hueplusplus/Schedule.h	100.00% <ø> (ø)
... and 33 more

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