release: 3.1.1

chore: use math import

Fixes for NS6 & NS7

Merge pull request #256 from NativeScript/bundev/fix-wrong-actionbar-…

…colors

fix: wrong ActionBar colors, introduced with node-sass fix in 2.3.2

Merge pull request #248 from NativeScript/bundev/fix-primary-colors

fix: Bootstrap and .nt-form colors not adapting to skin

Merge pull request #248 from NativeScript/bundev/fix-primary-colors

fix: Bootstrap and .nt-form colors not adapting to skin

chore: update platform versions

chore: unify issue templates (#206)

Remove border-radius-rounded variable - use border-radius-sm instead …

…(they had 1pt difference).

Make the default Image height only 20pt
Increase the side drawer header padding
Override the min-height for thumb/-thumb
Add -circle class to complement -rounded/rounded
Fix the esm to cjs transpilation (was breaking Angular projects in Playground)
Update CHANGELOG
Up the version

Export CSS variables in Core CSS

Fix divider colors
Add 5pt Button default padding
Remove default font-weight from .ns-root
Fix vertical SideDrawer header centering in iOS - remove height, use padding
Remove default FontAwesome 4 rule as it doesn't belong in the theme. Leave it for compat mode.
Update CHANGELOG
Update dependencies
Up the version