feat: enable static routes filtering by route component config

[yurks]

Default route component with property sitemap: true will mark corresponding route to be included in sitemap. Routes without this setting will be ignored.

[codecov]

Codecov Report

Merging #101 into dev will decrease coverage by 12.33%.
The diff coverage is 87.55%.

@@            Coverage Diff            @@
##            dev     #101       +/-   ##
=========================================
- Coverage   100%   87.66%   -12.34%     
=========================================
  Files         1        7        +6     
  Lines         3      227      +224     
  Branches      0       46       +46     
=========================================
+ Hits          3      199      +196     
- Misses        0       17       +17     
- Partials      0       11       +11

Impacted Files	Coverage Δ
lib/builder.js	100% <100%> (ø)
lib/options.js	100% <100%> (ø)
lib/middleware.js	100% <100%> (ø)
lib/module.js	100% <100%> (ø)
lib/generator.js	100% <100%> (ø)
lib/cache.js	100% <100%> (ø)
lib/routes.js	39.13% <39.13%> (ø)
... and 4 more

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