create equal sized folds for cv.kknn

[mkuehn10]

issue #14

[codecov-io]

Codecov Report

Merging #15 into master will decrease coverage by 2%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #15      +/-   ##
==========================================
- Coverage   25.93%   23.92%   -2.01%     
==========================================
  Files           4        4              
  Lines         802      769      -33     
==========================================
- Hits          208      184      -24     
+ Misses        594      585       -9

Impacted Files	Coverage Δ
R/kknn.R	21.82% <0%> (-2.96%)	:arrow_down:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 50d0737...2af2403. Read the comment docs.

[coveralls]

Pull Request Test Coverage Report for Build 36

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• 19 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-2.008%) to 23.927%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
R/kknn.R	0	2	0.0%
<!--	Total:	0	2

Files with Coverage Reduction	New Missed Lines	%
R/kknn.R	19	21.83%
<!--	Total:	19

Totals
Change from base Build 33:	-2.008%
Covered Lines:	184
Relevant Lines:	769

---

💛 - Coveralls

[mkuehn10]

Do you need me to provide anything else for this issue/pull request?