Updating TimeSeries methods

[sourabhdalvi]

• Adding get_time_series_by_key
• Adding new constructors for TimeSeriesKey ( 1. TimeSeriesData, 2. kwarg for deserialization)
• Adding new deserialize_struct for TimeSeriesKey
• Adding test for get_time_series_by_key

[codecov[bot]]

Codecov Report

Merging #160 into pre-10 will decrease coverage by 0.16%. The diff coverage is 38.46%.

@@            Coverage Diff             @@
##           pre-10     #160      +/-   ##
==========================================
- Coverage   69.20%   69.03%   -0.17%     
==========================================
  Files          45       45              
  Lines        2445     2458      +13     
==========================================
+ Hits         1692     1697       +5     
- Misses        753      761       +8     

Impacted Files	Coverage Δ
src/serialization.jl	41.25% <0.00%> (-4.59%)	:arrow_down:
src/component.jl	85.56% <100.00%> (+0.15%)	:arrow_up:
src/time_series_container.jl	58.53% <100.00%> (+3.27%)	:arrow_up: