feat: allow customize isProd function

[Jeff-Tian]

Checklist

• [x] npm test passes
• [x] tests and/or benchmarks are included
• [x] documentation is changed or added
• [x] commit message follows commit guidelines

Affected core subsystem(s)

Description of change

在碰到错误时，有一个判断是否为生产环境的逻辑 isProd，目前不能被自定义。故添加了自定义这个逻辑的功能，望采纳！

默认逻辑是看 app.config.env，如果不是 local 或者 unittest，就认为是正式生产环境，然而多数现实情况下，除了 local 和 unittest ，还有多个环境，比如：

• dev
• test
• stage
• prod
• canary
• qa 等等。很可能我们希望 dev 和 test 不算作正式环境（可以暴露原始错误堆栈信息）。

通过允许在 onerror 配置中自定义这个逻辑，可以让以上需求实现起来比较简单。

[codecov[bot]]

Codecov Report

Merging #30 (c51746e) into master (55d27e6) will increase coverage by 0.05%. The diff coverage is 100.00%.

:exclamation: Current head c51746e differs from pull request most recent head 8958ad6. Consider uploading reports for the commit 8958ad6 to get more accurate results

@@            Coverage Diff             @@
##           master      #30      +/-   ##
==========================================
+ Coverage   96.98%   97.04%   +0.05%     
==========================================
  Files           5        5              
  Lines         166      169       +3     
==========================================
+ Hits          161      164       +3     
  Misses          5        5              

Impacted Files	Coverage Δ
lib/utils.js	100.00% <100.00%> (ø)

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[popomore]

我们认为非本地环境都是在服务器部署的，行为应该一致，这个不应该被修改。

[Jeff-Tian]

默认是这样，但应允许改写，保持灵活

获取 Outlook for Androidhttps://aka.ms/ghei36

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From: Haoliang Gao [email protected] Sent: Monday, August 26, 2019 6:25:02 PM To: eggjs/egg-onerror [email protected] Cc: Jeff [email protected]; Author [email protected] Subject: Re: [eggjs/egg-onerror] feat: allow customize isProd function (#30)

我们认为非本地环境都是在服务器部署的，行为应该一致，这个不应该被修改。

― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/eggjs/egg-onerror/pull/30?email_source=notifications&email_token=AAZWHDDBR5VRDDSF2PZQLE3QGOVP5A5CNFSM4ILJBP5KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5D67BI#issuecomment-524808069, or mute the threadhttps://github.com/notifications/unsubscribe-auth/AAZWHDDSWBPHA7Q5DDXBQQ3QGOVP5ANCNFSM4ILJBP5A.

[hyj1991]

Duplicated with https://github.com/eggjs/egg-onerror/pull/33.