remove csrf auth method, because it doesnt work

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

Added category title field

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

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

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

Added new graphql request (no backwards compatibility from here)

Version bump

Added missing requirement

Merge pull request #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)