[Snyk] Upgrade sass from 1.49.9 to 1.51.0

Snyk has created this PR to upgrade sass from 1.49.9 to 1.51.0.

merge advice :information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

The recommended version is 5 versions ahead of your current version.
The recommended version was released a month ago, on 2022-04-26.

Release notes

Package name: sass

1.51.0 - 2022-04-26
To install Sass 1.51.0, download one of the packages below and add it to your PATH, or see the Sass website for full installation instructions.

Changes
- Potentially breaking change: Change the order of maps returned by map.deep-merge() to match those returned by map.merge(). All keys that appeared in the first map will now be listed first in the same order they appeared in that map, followed by any new keys added from the second map.
- Improve the string output of some AST nodes in error messages.
See the full changelog for changes in earlier releases.
1.50.1 - 2022-04-19
To install Sass 1.50.1, download one of the packages below and add it to your PATH, or see the Sass website for full installation instructions.

Changes

Embedded Sass
- The JS embedded host and the embedded compiler will now properly avoid resolving imports relative to the current working directory unless '.' is passed as a load path.
- Fix a bug in the JS embedded host's implementation of the legacy JS API where imports that began with / could crash on Windows.
See the full changelog for changes in earlier releases.
1.50.0 - 2022-04-07
To install Sass 1.50.0, download one of the packages below and add it to your PATH, or see the Sass website for full installation instructions.

Changes
- @ extend now treats :where() the same as :is().
Command Line Interface
- Closing the standard input stream will now cause the --watch command to stop running.
Embedded Sass
- Fix a bug where the JS embedded host crashed when invoking a legacy importer after resolving a relative filesystem import.
- Improve error messages when returning non-Object values from legacy importers.
See the full changelog for changes in earlier releases.
1.49.11 - 2022-04-01
To install Sass 1.49.11, download one of the packages below and add it to your PATH, or see the Sass website for full installation instructions.

Changes
- Add support for 64-bit ARM releases on Linux.
Embedded Sass
- The embedded compiler now correctly sets the id field for all OutboundMessages.
See the full changelog for changes in earlier releases.
1.49.10 - 2022-03-30
1.49.9 - 2022-02-24

from sass GitHub release notes

Commit messages

Package name: sass

0c24114 Update the order of maps returned by map.deep-merge() (#1680)
6eed6eb Fix the string representations of the Sass AST (#1682)
fbd450b Cut a release (#1671)
3dbb552 Add a changelog entry for sass/dart-sass-embedded#83 and sass/embedded-host-node#128 (#1668)
039f2ad Add support for :where() (#1662)
c7ab426 Abort sass if stdin is closed when watching (#1411)
db85276 Update the changelog for sass/embedded-host-node#120 (#1663)
d7d3f8f Cut a release (#1659)
6652001 Stop simplifying calculations in supports (#1653)
55157a5 Deploy linux arm64 release to github (#1643)
85ca0b2 Remove dead code in the stylesheet parser (#1640)
0db7ff2 Run formatter directly in grind.dart (#1654)
33f18c4 Preserve rgb/rgba/hsl/hsla formats in expanded mode (#1651)
3abcc20 Silence compiler warnings in dependency callables with --quiet-deps (#1650)