Mattermost-server: Remove deprecated lifecycle methods from autocomplete

[mattermod]

The following React lifecycle methods have been deprecated by React and will start to be removed starting in React 17:

• componentWillMount
• componentWillReceiveProps
• componentWillUpdate

The React team has published a guide discussing the changes and how to migrate to the new lifecycle methods here: https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html

As part of a campaign to remove these methods from https://github.com/mattermost/mattermost-mobile, these methods should be replaced in the following files:

• app/components/autocomplete/emoji_suggestion/emoji_suggestion.js
• app/components/autocomplete/slash_suggestion/slash_suggestion.js
• app/components/autocomplete/date_suggestion/date_suggestion.js
• app/components/autocomplete/channel_mention/channel_mention.js
• app/components/autocomplete/at_mention/at_mention.js

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If you're interested please comment here and come join our "Contributors" community channel on our daily build server, where you can discuss questions with community members and the Mattermost core team. For technical advice or questions, please join our "Developers" community channel.

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JIRA: https://mattermost.atlassian.net/browse/MM-18771

[dreewp]

I can work on this.

[jespino]

Great, thanks @akpark!

[jasonblais]

Hey @akpark, how are things going so far, any questions? :)

[nadalfederer]

Hi, this looks to be abandoned. Can I take this?

[jasonblais]

@nadalfederer Yeah that sounds good, thank you!

[hanzei]

@nadalfederer Just wanted to check if you are still working on this issue

[nadalfederer]

I'm sorry, I forgot about this. I can finish it this week, is this ok?

[hanzei]

No problem @nadalfederer. I just wanted to touch bases. Take your time :+1:

[a-c-sreedhar-reddy]

Hi Can I work on this?