Spidermon

-------------------
- feature: Built-in monitor for field and item coverage (`issue253 <https://github.com/scrapinghub/spidermon/issues/253>`_)
- feature: Add field coverage statistics (`PR262 <https://github.com/scrapinghub/spidermon/pull/262>`_)
- chore: Update required slackclient version (`PR265 <https://github.com/scrapinghub/spidermon/pull/265>`_)
- chore: Add Python 3.8 support (`issue255 <https://github.com/scrapinghub/spidermon/issues/255>`_)
- chore: Drop Python 3.5 support (`issue266 <https://github.com/scrapinghub/spidermon/issues/266>`_)
- chore: Remove test decorator that skips tests if executed in old Python versions (`PR258 <https://github.com/scrapinghub/spidermon/pull/258>`_)
- chore: Fix deprecation warnings (`PR272 <https://github.com/scrapinghub/spidermon/pull/272>`_, `PR#274 <https://github.com/scrapinghub/spidermon/pull/274>`_)
- docs: Fix inconsistent examples (`PR273 <https://github.com/scrapinghub/spidermon/pull/273>`_)

-------------------
- bug: Fix Telegram action error logging
- feature: Disable item validation pipeline when Spidermon is disabled
- feature: Item validation built in monitor
- chore: Removed Python 2.7 support
- docs: Improved documentation organization

-------------------
- Fixed version 1.12.1 changelog

-------------------
- bugfix: AttributeError when using ValidationMonitorMixin (`issue <https://github.com/scrapinghub/spidermon/issues/246>`_)
- docs: How-To Guide - Adding required fields coverage validation (`pull request <https://github.com/scrapinghub/spidermon/pull/247>`_)

-------------------

- Dropped python 3.4 support
- Added action to send monitor reports to Telegram
- Added fallback to scrapy AWS settings
- Logged errors from Slack API calls
- Allowed to define SPIDERMON_SLACK_RECIPIENTS setting as a comma-separated string with the desired recipients
- Read SES settings with getlist
- Added documentation of Expression Monitors
- Improved Slack action documentation
- Fixed sphinx warnings when building docs
- Fixed warnings in docs build
- Validate docs build in CI
- Applied and enforced black formatting on spidermon source code
- Configured test coverage reporting in project

-------------------

- Allowed per-field checking in ValidationMonitorMixin
- Added option to set AWS Region Name on SES E-Mail action
- Added default value for 'SPIDERMON_BODY_HTML_TEMPLATE' setting
- Fixed bug in logging of Slack messages when fake setting is enabled
- Enforced lxml 4.3.5 or lower for Python 3.4
- Improved stats history documentation