add tests

src/lib/strings/email-typo.ts

@@ -0,0 +1,9 @@
+import type tldts from 'tldts'
+
+const COMMON_ERROR_PATTERN =
+  /\b([a-zA-Z0-9._%+-]+)@(gnail\.(co|com)|gmaill\.(co|com)|gmai\.(co|com)|gmail\.co|gmal\.(co|com)|iclod\.(co|com)|icloud\.co|outllok\.(co|com)|outlok\.(co|com)|outlook\.co|yaoo\.(co|com)|yaho\.(co|com)|yahoo\.co|yahooo\.(co|com))\b/
+
+export function emailTypoCheck(email: string, dynamicTldts: typeof tldts) {
+  const isIcann = dynamicTldts.parse(email).isIcann
+  return !isIcann || COMMON_ERROR_PATTERN.test(email)
+}