fix(validator): number len msg should be length, not equal

src/common/helpers/validator/language/chinese.js

@@ -31,7 +31,7 @@ export default {
   },
   len: {
     string: /* istanbul ignore next */ (config) => `请输入 ${config} 位字符`,
-    number: /* istanbul ignore next */ (config) => `需等于 ${config}`,
+    number: /* istanbul ignore next */ (config) => `长度应等于 ${config}`,
     array: /* istanbul ignore next */ (config) => `请选择 ${config} 项`,
     date: /* istanbul ignore next */ (config) => `请选择 ${toLocaleDateString(config, 'zh')}`,
     email: /* istanbul ignore next */ (config) => `请输入 ${config} 位字符`,

src/common/helpers/validator/language/english.js

@@ -31,7 +31,7 @@ export default {
   },
   len: {
     string: /* istanbul ignore next */ (config) => `Please input ${config} characters.`,
-    number: /* istanbul ignore next */ (config) => `The number should equal ${config}`,
+    number: /* istanbul ignore next */ (config) => `The length should equal ${config}`,
     array: /* istanbul ignore next */ (config) => `Please select ${config} items`,
     date: /* istanbul ignore next */ (config) => `Please select ${toLocaleDateString(config, 'en')}`,
     email: /* istanbul ignore next */ (config) => `Please input ${config} characters.`,