Match SymbolDescriptors with a numeric score

[felixfbecker]

This allows a workspace/symbol with SymbolDescriptor query to still match a symbol where e.g. all properties expect the containerName match as long as there is no better match.
workspace/symbol now streams results in the order of the match score (through the JSON Patch path index).

[codecov]

Codecov Report

Merging #249 into master will decrease coverage by 0.03%.
The diff coverage is 75.51%.

@@            Coverage Diff             @@
##           master     #249      +/-   ##
==========================================
- Coverage   57.86%   57.83%   -0.04%     
==========================================
  Files          13       13              
  Lines        2053     2056       +3     
  Branches      338      340       +2     
==========================================
+ Hits         1188     1189       +1     
  Misses        731      731              
- Partials      134      136       +2

Impacted Files	Coverage Δ
src/util.ts	74.82% <66.66%> (-0.37%)	⬇️
src/typescript-service.ts	69.35% <76.74%> (-0.21%)	⬇️

---

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 168c60f...3f0e0e8. Read the comment docs.