1. rename dependencies.json to libraries.json
2. update scheme versions
3. drops repositories of scheme 1.x as those support ST2 only.
4. drops libraries, which support ST2 only.
5. drops packages, which support ST2 only.

The `sublime_text` key is optional as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Add list of required "libraries", to ensure "lxml" is also installed.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Note: Opt-in to python 3.8 as it is a pure python library.

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Rename dependency to PyPI package name to avoid future naming conflicts.

Note: Required name mapping to ensure backward compatibility is supported
      as of PC 4.0.0-beta.9

Note: Opt-in to python 3.8 as it is a pure python library.

This commit ...

1. renames tokens:
   dependency => library
   dependencies => libraries

2. adjusts scheme versions to 4.0.0

3. drops `load_order` from libraries

4. drops tests for presence of `sublime_text` and `platforms` keys from release
   tests, as those are optional as of PC4.0-beta.9

5. drops duplicate library vs. package name checks, as libraries are installed
   independently to Libs/ as of PC4.0

6. adds `python_versions` type and value checks.

7. verify new libraries are not named like renamed legacy dependencies.

This commit adds `Binary` and `Git Formats` to the list of default packages.

This commit adds `Binary` and `Git Formats` to the list of default packages.

1. sort urls alphabetically
2. reformat patterns to use more of available space
3. disallow `#` (start of anchors) and `?` (start of parameters)
   in user and repository names
4. move (?<!\.git) to ensure not to accept something like
   https://github.com/repo/user.git/tree/master

Now that arm64 is supported it is very valid to have both x32 and x64
to specify arm64 is not supported.

To support validation and completions via LSP-json, Package Control ships
json schemas for channels and repositories.

This commit allows them to be explicitly assigned without tests failing via
- "$schema": "sublime://packagecontrol.io/schemas/channel",
- "$schema": "sublime://packagecontrol.io/schemas/repository",

Ship libraries for python 3.8 directly from pypi.

Remove repository of scheme 1.2 as no longer supported.

Dropped package.json is missing "details" or "base" entries for more about 8
years and thus has never been crawled. As such, drop that questionable thing.

url and base keys are already handled some lines above.

... didn't match osx-arm64 before.

Sync with intermediate channel from https://github.com/packagecontrol/channel

Sublime Merge messes line endings when resolving conflicts on Windows
with the removed setting being present.

Package Control 4 requires ST3143+.
All older builds are ignored.

So `*` is equal to `>=3143`.

Selectors with lower numbers are no longer needed.