Added Carthage and SwiftPM badge

[migs647]

What does this PR do?
Adds badges and updates Carthage Makefile

Where should the reviewer start?
👀

How should this be manually tested?
Execute make build on the carthage example

Any background context you want to provide?

What are the relevant tickets?

Screenshots or screencasts (if UI/UX change)

Questions:

• Does the docs need an update?
• Are there any security concerns?
• Do we need to update engineering / success?

[codecov-commenter]

Codecov Report

Merging #922 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #922      +/-   ##
==========================================
+ Coverage   85.97%   86.03%   +0.05%     
==========================================
  Files          58       58              
  Lines        3345     3345              
==========================================
+ Hits         2876     2878       +2     
+ Misses        469      467       -2