[fix] BasicSessionStat对连接做非空检查，防止panic #673

	name: CI

	on:
	push:
	pull_request:
	schedule:
	- cron: '30 16 * * 6'

	jobs:
	build:
	strategy:
	matrix:
	go: ['1.18', '1.20']
	os: [ubuntu-latest, macos-latest]
	runs-on: ${{ matrix.os }}

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go }}

	- name: Build
	run: ./script/build.sh

	- name: Test
	run: make test

	- name: Upload coverage to Codecov
	run: bash <(curl -s https://codecov.io/bash)

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