fix: use secure protocol when endpoint is unspecified

[pilaoda]

fc-core/src/fc-client/index.ts

Lines 65 to 72 in 75db3c3

	return new FC(credentials.AccountID, {
	accessKeyID: credentials.AccessKeyID,
	accessKeySecret: credentials.AccessKeySecret,
	securityToken: credentials.SecurityToken,
	region,
	timeout,
	endpoint,
	});

使用serverless-dev的s deploy时，这里的endpoint固定是http，无法配置，更新函数会泄漏环境变量

[pilaoda]

@wss-git @heimanba 有大佬在维护吗？这个没修用着没安全感