Merge pull request fspv#16 from prius/dev-problemset-query

Added category title field

Merge pull request fspv#15 from prius/dev-problemset-query

Added titleSlug field to question details and fixed totalNum field na…

Merge pull request fspv#13 from prius/dev-problemset-query

Added new graphql request (no backwards compatibility from here)

Version bump

Added missing requirement

Merge pull request fspv#5 from prius/dev

Stricter types (preparation to switch to openapi generator)

Added frequency field to graphql query

Removed travis CI config (replaced by github actions)