fix: handle empty body gracefully

source/rules/body-min-length.js

@@ -1,6 +1,10 @@
 import ensureMinLength from '../library/ensure-min-length';
 
 export default (parsed, when, value) => {
+	if (!parsed.body) {
+		return [true];
+	}
+
 	return [
 		ensureMinLength(parsed.body, value),
 		`body must not be shorter than ${value} characters`

source/rules/body-min-length.test.js

@@ -19,7 +19,7 @@ const parsed = {
 	long: parse(messages.long)
 };
 
-test.failing('with simple message should succeed', t => {
+test('with simple message should succeed', t => {
 	const [actual] = bodyMinLength(parsed.simple, '', needed);
 	const expected = true;
 	t.is(actual, expected);