feat: initial setup of using hspec
feat: solving problem with recursion
feat: add problem 2 solution
feat: add problem 3
feat: problem 4
feat: problem 5
feat: problem 6
feat: welcome to types
feat: problem 8
feat: problem 9
feat: problem 10
feat: move problem 10 to anonymous function
feat: use pointfree style on problem 10
fix: partial function in problem 2
feat: solve problem 11