bump to linter 0.1.69


* improved message display for `await_only_futures`
* performance improvements for `null_closures`
* new lint: `avoid_returning_null_for_void`

Change-Id: Ib00f88cc93e1b81fd6d87880edfc1440233c1538
Reviewed-on: https://dart-review.googlesource.com/c/80507
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f9775a..d3d9b23 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -156,8 +156,9 @@
 
 #### Linter
 
-Bumped the linter to `0.1.68` which includes the following new lints:
+Bumped the linter to `0.1.69` which includes the following new lints:
 
+* `avoid_returning_null_for_void`
 * `sort_pub_dependencies`
 * `prefer_mixin`
 * `avoid_implementing_value_types`
@@ -167,6 +168,8 @@
 
 and improvements:
 
+* improved message display for `await_only_futures`
+* performance improvements for `null_closures`
 * mixin support
 * update to `sort_constructors_first` to apply to all members
 * update `unnecessary_this` to work on field initializers
diff --git a/DEPS b/DEPS
index fb8ab14..a039af6 100644
--- a/DEPS
+++ b/DEPS
@@ -95,7 +95,7 @@
   "intl_tag": "0.15.7",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "json_rpc_2_tag": "2.0.9",
-  "linter_tag": "0.1.68",
+  "linter_tag": "0.1.69",
   "logging_tag": "0.11.3+2",
   "markdown_tag": "2.0.2",
   "matcher_tag": "0.12.3",