feat: add support for TypeScript based configs

Resolves #631

Author: xeho91

src/utils.js

@@ -59,16 +59,25 @@ async function loadConfig(loaderContext, config, postcssOptions) {
       `.${moduleName}rc.js`,
       `.${moduleName}rc.mjs`,
       `.${moduleName}rc.cjs`,
+      `.${moduleName}rc.ts`,
+      `.${moduleName}rc.mts`,
+      `.${moduleName}rc.cts`,
       `.config/${moduleName}rc`,
       `.config/${moduleName}rc.json`,
       `.config/${moduleName}rc.yaml`,
       `.config/${moduleName}rc.yml`,
       `.config/${moduleName}rc.js`,
       `.config/${moduleName}rc.mjs`,
       `.config/${moduleName}rc.cjs`,
+      `.config/${moduleName}rc.ts`,
+      `.config/${moduleName}rc.mts`,
+      `.config/${moduleName}rc.cts`,
       `${moduleName}.config.js`,
       `${moduleName}.config.mjs`,
       `${moduleName}.config.cjs`,
+      `${moduleName}.config.ts`,
+      `${moduleName}.config.mts`,
+      `${moduleName}.config.cts`,
     ],
     loaders: {
       ".js": async (...args) => {