feat: add bounds to tilejson endpoints

[stepankuzmin]

No description provided.

[codecov]

Codecov Report

Merging #260 (94b0e7e) into master (0071e94) will increase coverage by 1.67%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##           master     #260      +/-   ##
==========================================
+ Coverage   48.15%   49.82%   +1.67%     
==========================================
  Files          14       14              
  Lines        1676     1724      +48     
==========================================
+ Hits          807      859      +52     
+ Misses        869      865       -4     

Impacted Files	Coverage Δ
src/table_source.rs	67.64% <64.28%> (+0.62%)	⬆️
src/utils.rs	83.33% <93.33%> (+12.74%)	⬆️
src/composite_source.rs	88.67% <100.00%> (+4.46%)	⬆️
src/dev.rs	100.00% <100.00%> (ø)
src/lib.rs	45.62% <0.00%> (+0.14%)	⬆️

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