fix: exclude verify type of RegExp

[zhangxiaoyu713]

add exclude verify type of RegExp:
if exclude type is Function, it has a bug
eg:
postCssPxToRem({
exclude: (filePath) => {
const reg = /src/pages/m|src/components/m|share/components/m/;
return !reg.test(filePath);
},
})
if we got a filePath: '/project/src/components/m/Button.scss', exclude(filePath) return false, but isExcludeFile will be true;
because filePath.match(exclude) !== null

if we pass a function to math, it will be potential risks:
console.log('abc'.match(() => { const reg = /a|b|c/; }))