"Spin Reverse" wrong calculation

[FeBe95]

.hamburger--spin-r.is-active .hamburger-inner::after for "spin reverse" needs to be rotated 90deg instead of -90deg like the normal spin (line 36 in spin-r.scss)

[jonsuh]

Hey @FeBe95. Thanks for pointing that out!

I pushed a commit to fix it 61e9242 and updated with a new release to include the fix https://github.com/jonsuh/hamburgers/releases/tag/v0.6.0.