linter 1.4.0

Mitigating PRs:

https://dart-review.googlesource.com/c/sdk/+/196223
https://dart-review.googlesource.com/c/sdk/+/196180

flutter/flutter#80817
flutter/flutter#80901





Change-Id: Ib916d541076e24b9e8db1d6120dbc043d9e40b87
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196026
Commit-Queue: Phil Quitslund <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: pq

CHANGELOG.md

@@ -27,8 +27,14 @@
 
 #### Linter
 
-Updated the Linter to `1.3.0`, which includes:
-
+Updated the Linter to `1.4.0`, which includes:
+
+- `directives_ordering` now checks ordering of `package:` imports in code
+  outside pub packages.
+- simple reachability analysis added to `use_build_context_synchronously` to
+  short-circuit await-discovery in terminating blocks.
+- `use_build_context_synchronously` updated to recognize nullable types when
+  accessed from legacy libraries.
 - updated `non_constant_identifier_names` to check local variables, for-loop
   initializers and catch clauses.
 - updated error range of `lines_longer_than_80_chars` to start at 80 to make

DEPS

@@ -124,7 +124,7 @@ vars = {
   "intl_tag": "0.17.0-nullsafety",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "json_rpc_2_rev": "b8dfe403fd8528fd14399dee3a6527b55802dd4d",
-  "linter_tag": "1.3.0",
+  "linter_tag": "1.4.0",
   "logging_rev": "e2f633b543ef89c54688554b15ca3d7e425b86a2",
   "markupsafe_rev": "8f45f5cfa0009d2a70589bcda0349b8cb2b72783",
   "markdown_rev": "9c4beaac96d8f008078e00b027915f81b665d2de",