Demisto-sdk

* Fixed an issue where running the **format** command on feed integrations removed the `defaultvalue` fields.
* Playbook branch marked with *skipunavailable* is now set as an optional dependency in the **find-dependencies** command.
* The **feedReputation** parameter can now be hidden in a feed integration.
* Fixed an issue where running the **unify** command on JS package failed.
* Added the *--no-update* flag to the **find-dependencies** command.
* Added the following validations in **validate** command:
* Validating that a pack does not depend on NonSupported / Deprecated packs.

* Added the *--description* option to the **init** command.
* Added the *--contribution* option to the **init** command which converts a contribution zip to proper pack format.
* Improved **validate** command performance time and outputs.
* Added the flag *--no-docker-checks* to **validate** command to skip docker checks.
* Added the flag *--print-ignored-files* to **validate** command to print ignored files report when the command is done.
* Added the following validations in **validate** command:
* Validating that existing release notes are not modified.
* Validating release notes are not added to new packs.
* Validating that the "currentVersion" field was raised in the pack_metadata for modified packs.
* Validating that the timestamp in the "created" field in the pack_metadata is in ISO format.
* Running `demisto-sdk validate` will run the **validate** command using git and only on committed files (same as using *-g --post-commit*).
* Fixed an issue where release notes were not checked correctly in **validate** command.
* Fixed an issue in the **create-id-set** command where optional playbook tasks were not taken into consideration.
* Added a prompt to the `demisto-sdk update-release-notes` command to prompt users to commit changes before running the release notes command.
* Added support to `layoutscontainer` in **validate** command.

* Fixed an issue in **find-dependencies** command.
* **lint** command now verifies flake8 on CommonServerPython script.

* Fixed an issue with the default output file name of the **unify** command when using "." as an output path.
* **Unify** command now adds contributor details to the display name and description.
* **Format** command now adds *isFetch* and *incidenttype* fields to integration yml.
* Removed the *feedIncremental* field from the integration schema.
* **Format** command now adds *feedBypassExclusionList*, *Fetch indicators*, *feedReputation*, *feedReliability*,
*feedExpirationPolicy*, *feedExpirationInterval* and *feedFetchInterval* fields to integration yml.
* Fixed an issue in the playbooks schema.
* Fixed an issue where generated release notes were out of order.
* Improved pack dependencies detection.
* Fixed an issue where test playbooks were mishandled in **validate** command.

* Added a validation for invalid id fields in indicators types files in **validate** command.
* Added default behavior for **update-release-notes** command.
* Fixed an error where README files were failing release notes validation.
* Updated format of generated release notes to be more user friendly.
* Improved error messages for the **update-release-notes** command.
* Added support for `Connections`, `Dashboards`, `Widgets`, and `Indicator Types` to **update-release-notes** command.
* **Validate** now supports scripts under the *TestPlaybooks* directory.
* Fixed an issue where **validate** did not support powershell files.

* Added a validation for invalid playbookID fields in incidents types files in **validate** command.
* Added a code formatter for python files.
* Fixed an issue where new and old classifiers where mixed on validate command.
* Added *feedIncremental* field to the integration schema.
* Fixed error in the **upload** command where unified YMLs were not uploaded as expected if the given input was a pack.
* Fixed an issue where the **secrets** command failed due to a space character in the file name.
* Ignored RN validation for *NonSupported* pack.
* You can now ignore IF107, SC100, RP102 error codes in the **validate** command.
* Fixed an issue where the **download** command was crashing when received as input a JS integration or script.
* Fixed an issue where **validate** command checked docker image for JS integrations and scripts.
* **validate** command now checks scheme for reports and connections.
* Fixed an issue where **validate** command checked docker when running on all files.
* Fixed an issue where **validate** command did not fail when docker image was not on the latest numeric tag.
* Fixed an issue where beta integrations were not validated correctly in **validate** command.