add OrsOptimization

[EmmaHegarty]

Adds support for Optimization Service on the basis of the current main branch, requested in https://github.com/GIScience/openrouteservice-js/issues/38 and initially added in https://github.com/GIScience/openrouteservice-js/pull/45 .

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-commenter]

Codecov Report

Merging #56 (9702a39) into main (b37311c) will increase coverage by 0.17%. The diff coverage is 88.00%.

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
+ Coverage   84.21%   84.38%   +0.17%     
==========================================
  Files          15       16       +1     
  Lines         342      365      +23     
  Branches       65       68       +3     
==========================================
+ Hits          288      308      +20     
- Misses         43       45       +2     
- Partials       11       12       +1     

Impacted Files	Coverage Δ
src/index.js	71.42% <ø> (ø)
src/OrsOptimization.js	86.95% <86.95%> (ø)
src/OrsElevation.js	90.00% <100.00%> (ø)

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