Incompatibility with themeProvider

[jeromeBell]

Hi,

First thank you for issuing this library.
I was trying to include it in one of my project but I am struggling to theme Bulma (colors for example).

I've added a on top of my component with the following theme
{
primary: '#E7272D',
}

It throws the following error in React :
TypeError: Cannot convert undefined or null to object
colorClasses
node_modules/bulma-styled-components/dist/index.js:3133
3130 |
3131 | var colorClasses$6 = function colorClasses(_ref5) {
3132 | var theme = _ref5.theme;

3133 | return Object.entries(theme['colors']).reduce(function (acc, _ref6) {
| ^ 3134 | var _ref7 = slicedToArray(_ref6, 2),
3135 | name = _ref7[0],
3136 | _ref7$ = slicedToArray(_ref7[1], 2),
View compiled

I tried to read the source code to get a clue but without any chance.... Do I miss something?

Thanks in advance for your help.