fix: add min length matcher

src/index.ts

@@ -1,4 +1,5 @@
 export { uppercaseMatcher } from './matchers/uppercaseMatcher';
+export { minLengthMatcher } from './matchers/minLengthMatcher';
 export { lowercaseMatcher } from './matchers/lowercaseMatcher';
 export { numberMatcher } from './matchers/numberMatcher';
 export { specialMatcher } from './matchers/specialMatcher';

src/matchers/minLengthMatcher.ts

@@ -0,0 +1,19 @@
+import { Matcher, Match } from '@zxcvbn-ts/core/dist/types';
+
+export const minLengthMatcher = (minLength: number): Matcher => ({
+  Matching: class MinLengthMatcher {
+    match({ password }: { password: string }): Match[] {
+      const matches: Match[] = [];
+      if (password.length < minLength) {
+        matches.push({ pattern: 'minLength', token: password, i: 0, j: password.length - 1 });
+      }
+      return matches;
+    }
+  },
+  feedback(_match) {
+    return { warning: `Password must be at least ${minLength} characters long.`, suggestions: [] };
+  },
+  scoring(_match) {
+    return -100;
+  },
+});