bump linter to 1.20.0

Change-Id: I44ca585b3cf3649983955a2202c8fb093677329a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/237184
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>

CHANGELOG.md

@@ -103,9 +103,11 @@
 
 #### Linter
 
-Updated the Linter to `1.19.2`, which includes changes that
+Updated the Linter to `1.20.0`, which includes changes that
 
-- adds new lint: `use_super_initializers`.
+- fixes `unnecessary_null_aware_assignments` property-access
+  false positives.
+- adds new lint: `use_super_parameters`.
 - adds new lint: `use_enums`.
 - adds new lint: `use_colored_box`.
 - improves performance for `sort_constructors`.

DEPS

@@ -124,7 +124,7 @@ vars = {
   "intl_tag": "9669926609e7efc17dfd74fbb44ec719a7e573cc", # 0.17.0-nullsafety
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "json_rpc_2_rev": "7e00f893440a72de0637970325e4ea44bd1e8c8e",
-  "linter_tag": "4eaae25b00f3c29935ab0d804b8711cf9a645519", # 1.19.2
+  "linter_tag": "ed26087ae1b54fb8c532fcda618e6bf08827e315", # 1.20.0
   "lints_tag": "f9670df2a66e0ec12eb51554e70c1cbf56c8f5d0",
   "logging_rev": "dfbe88b890c3b4f7bc06da5a7b3b43e9e263b688",
   "markupsafe_rev": "8f45f5cfa0009d2a70589bcda0349b8cb2b72783",

pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml

@@ -1842,7 +1842,7 @@ LintCode.use_setters_to_change_properties:
   status: needsEvaluation
 LintCode.use_string_buffers:
   status: needsEvaluation
-LintCode.use_super_initializers:
+LintCode.use_super_parameters:
   status: needsFix
 LintCode.use_test_throws_matchers:
   status: needsEvaluation