Create integrations tests for all MeiliSearch http routes

[bidoubiwa]

• Client tests add document and Client tests tested with a running meilisearch in CI #32
• Indexes tests add document and Client tests tested with a running meilisearch in CI #32
• Documents tests add document and Client tests tested with a running meilisearch in CI #32
• add Settings integrations tests
  • attributes for faceting tests
  • displayed attributes tests
  • distinct attributes tests
  • ranking rules tests
  • searchable attributes tests
  • settings route tests
  • stop words tests
  • synonyms tests
• update route tests
• search route tests
  • limit tests
  • offset tests
  • attributes to crop tests
  • cropLength tests
  • matches tests
  • attributesToHighlight tests
  • attributesToRetrieve tests
  • filters tests
  • facetsDistribution tests
  • facetFilters tests