Mathjs: quantileSeq has inconsistant return

[harrysarson]

I found that quantileSeq has an inconsistent return:

• math.quantileSeq([1,2,3,4,5], math.bignumber(.2)) returns bignumber(1.8).
• math.quantileSeq([1,2,3,4,5], math.bignumber(.25)) returns 2 (a non big number).

This should have been flagged by mathjs tests but node's assert.equal has let us down. I found this whilst swapping assert.equal for assert.strictEqual.

I am fairly confident that this is a bug.

[josdejong]

Very nice that this issue pops up now with assert.strictEqual :+1:

[josdejong]

Should be fixed now via https://github.com/josdejong/mathjs/commit/4e1bed2a74fd6f85cf82fb0e3e0f4524d75cd492