密码格式校验

针对修改密码功能，校验密码格式：

        <el-form-item
          label="Password"
          prop="newPassword"
          :rules="[
            {required: true, message: 'please enter password', trigger: 'blur'},
            {min: 8, message: 'password length should not be less than 8', trigger: 'blur'},
            {pattern: /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[~!@#￥%&*_])[A-Za-z\d~!@#￥%&*_]{8,}$/, message: 'password should contain uppercase, lowercase, number and special character (~!@#￥%&*_)', trigger: 'blur'}
          ]"
        >
          <el-input v-model="temp.newPassword" type="password" clearable show-password></el-input>
        </el-form-item>
        <el-form-item
          label="Confirm Password"
          prop="confirmPassword"
          :rules="[
            {required: true, message: 'please enter password', trigger: 'blur'},
            {validator: (rule, value, callback) => {
              if (value !== temp.newPassword) {
                callback(new Error('The two passwords do not match'));
              } else {
                callback();
              }
            }, trigger: 'blur'}
          ]"
        >
          <el-input v-model="temp.confirmPassword" type="password" clearable show-password></el-input>
        </el-form-item>