Theme can now be changed by changing the theme prop

[hetanthakkar]

What kind of change does this PR introduce?

Added ability to change the theme for a component tree via state change
Fixed issue #2754

[hetanthakkar]

@flyingcircle Sorry for reopening this PR again. I have made the necessary changes and made the code much simpler. Can you please review!? I closed that PR because I accidentally messed up with git and deleted that branch. Will be cautious next time. Sorry for trouble

[codecov]

Codecov Report

Merging #2891 (501d467) into next (a5c0931) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             next    #2891      +/-   ##
==========================================
+ Coverage   88.20%   88.24%   +0.03%     
==========================================
  Files          50       50              
  Lines        1009     1012       +3     
  Branches      402      401       -1     
==========================================
+ Hits          890      893       +3     
  Misses         76       76              
  Partials       43       43              

Impacted Files	Coverage Δ
src/config/ThemeProvider.tsx	100.00% <100.00%> (ø)
src/searchbar/SearchBar.tsx	100.00% <0.00%> (ø)
src/searchbar/SearchBar-ios.tsx	91.22% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a5c0931...501d467. Read the comment docs.

[hetanthakkar]

@flyingcircle yeah! you are right. We need to detect that. I think I need to get some sleep. I am making too many silly mistakes.

[flyingcircle]

CI is saying you're failing the unit tests. Please fix first.

[hetanthakkar]

@flyingcircle I have also added isTheme condition in the if statement to check if the theme has been supplied. It is necessary to check as a test case in test file was failing as its style got changed in getDerivedStateFromProps because state.theme!==props.theme always holds true in the beginning if the theme is not supplied

[hetanthakkar]

@flyingcircle Please review!

[hetanthakkar]

@flyingcircle Can you please review!