Slack-sdk

Refer to [v2.8.1 milestone](https://github.com/slackapi/python-slackclient/milestone/15?closed=1) to know the complete list of the issues resolved by this release.

**Updates**

1. [WebClient] 778 779 Adding support for View objects for views.push/update/publish - Thanks ruberVulpes
2. [WebClient] 786 Fix admin.conversations.restrictAccess.* methods to match documentation - Thanks ruberVulpes

Refer to [v2.8.0 milestone](https://github.com/slackapi/python-slackclient/milestone/14?closed=1) to know the complete list of the issues resolved by this release.

**New Features**

1. [WebClient] 765 766 Introduce AsyncWebClient/AsyncWebhookClient providing coroutines - Thanks seratch
2. [Block Kit] 767 768 Add "header" block support - Thanks mwbrooks

**Updates**

1. [WebClient] 738 Add HTTP_PROXY, HTTPS_PROXY env variable support in async WebClient - Thanks iamtofr seratch
2. [WebClient] 769 773 Enable User-Agent to have additional info part - Thanks seratch
3. [WebClient] 770 771 Fix a bug where `files.upload`'s file param doesn't accept bytes data - Thanks seratch

Refer to [v2.7.3 milestone](https://github.com/slackapi/python-slackclient/milestone/13?closed=1) to know the complete list of the issues resolved by this release.

**Updates**

1. [WebClient] 754 Fix 729 Add admin.conversations.restrictAccess.*, conversations.mark API - Thanks ruberVulpes kian2attari
2. [WebClient] 758 Fix 757 Add admin.usergroups.addTeams, calls.participants.remove API - Thanks seratch
3. [WebClient] 727 Fix 645 Unclosed client session - Thanks NoAnyLove jourdanrodrigues
4. [WebClient] 745 Fix 744 a validation logic bug in DatePickerElement - Thanks dzudi941
5. [WebClient] 752 Fix 733 Better error handling when getting TimeoutError in RTMClientstart() - Thanks liorblob seratch
6. [WebClient] 751 Fix 718 by handling unexpected response body format - Thanks jeffbuswell seratch

Refer to [v2.7.2 milestone](https://github.com/slackapi/python-slackclient/milestone/12?closed=1) to know the complete list of the issues resolved by this release.

**Updates**

1. [WebClient] Fix 728 by adding bytearray support in files_upload (sync mode) - Thanks sofya-salmanova seratch
2. [WebClient] 726 Fix InputBlock.hint validation failure - Thanks jourdanrodrigues
3. [WebClient] 723 Correct the default value of InputBlock.label, hint - Thanks jourdanrodrigues

This release includes the fixes for regression bugs in `WebClient` since v2.6.0. Refer to [v2.7.1 milestone](https://github.com/slackapi/python-slackclient/milestone/11?closed=1) to know the complete list of the issues resolved by this release.

**Updates**

1. [WebClient] 716 712 Support timeout in sync web clients - Thanks DanialErfanian seratch
2. [WebClient] 713 Support custom SSL context in sync web clients - Thanks austinbutler
3. [WebClient] 715 714 Support proxy in sync sync web clients - Thanks austinbutler seratch

Refer to [v2.7.0 milestone](https://github.com/slackapi/python-slackclient/milestone/6?closed=1) to know the complete list of the issues resolved by this release.

**New Features**

1. [WebhookClient] 707 270 531 Add `WebhookClient` for Incoming Webhooks & response_url - Thanks seratch chubz Ambro17

**Updates**

1. [WebClient] 704 695 Add `calls_*` methods to `WebClient` and `CallBlock` in Block Kit classes - Thanks seratch
2. [WebClient] 710 536 Allow Tokens to be specified per request - Thanks seratch
3. [WebClient] 709 708 Add default_to_current_conversation in conversations_select elements - Thanks seratch