Add QuadGK

Author: blegat

docs/Project.toml

@@ -17,6 +17,7 @@ MultivariatePolynomials = "102ac46a-7ee4-5c85-9060-abc95bfdeaa3"
 MutableArithmetics = "d8a4904e-b15c-11e9-3269-09a3773c0cb0"
 PermutationGroups = "8bc5a954-2dfc-11e9-10e6-cd969bffa420"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
+QuadGK = "1fd47b50-473d-5c70-9696-f719f8f3bcdc"
 RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
 SumOfSquares = "4b9e565b-77fc-50a5-a571-1244f986bda1"
 SymbolicWedderburn = "858aa9a9-4c7c-4c62-b466-2421203962a2"