Disable plugins using corePlugins instead of variants

defaultConfig.stub.js

@@ -791,8 +791,8 @@ module.exports = {
     minHeight: ['responsive'],
     minWidth: ['responsive'],
     negativeMargin: ['responsive'],
-    objectFit: false,
-    objectPosition: false,
+    objectFit: [],
+    objectPosition: [],
     opacity: ['responsive'],
     outline: ['focus'],
     overflow: ['responsive'],
@@ -816,6 +816,10 @@ module.exports = {
     width: ['responsive'],
     zIndex: ['responsive'],
   },
+  corePlugins: {
+    objectFit: false,
+    objectPosition: false,
+  },
   plugins: [
     require('./plugins/container')({
       // center: true,

src/corePlugins.js

@@ -49,9 +49,9 @@ import whitespace from './plugins/whitespace'
 import width from './plugins/width'
 import zIndex from './plugins/zIndex'
 
-function loadPlugins({ styles, variants }, plugins) {
+function loadPlugins({ styles, variants, corePlugins }, plugins) {
   return Object.keys(plugins)
-    .filter(plugin => variants[plugin] !== false)
+    .filter(plugin => corePlugins[plugin] !== false)
     .map(plugin => plugins[plugin]({
       values: styles[plugin],
       variants: variants[plugin],