Bump tar to 5a1ea943e70cdf3fa5e1102cdbb9418bd9b4b81a

Changes:
```
> git log --format="%C(auto) %h %s" 32ceb55..5a1ea94
 https://dart.googlesource.com/external/github.com/simolus3/tar.git/+/5a1ea94 Update `package:lints`

```

Diff: https://dart.googlesource.com/external/github.com/simolus3/tar.git/+/32ceb55e673141abff4e84b99483fe5eb881c291..5a1ea943e70cdf3fa5e1102cdbb9418bd9b4b81a/
Change-Id: I0aa2cc9d02d0a1053ed3e4f3d721f9151d9bb6fe
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/388940
Auto-Submit: Devon Carew <[email protected]>
Reviewed-by: Sigurd Meldgaard <[email protected]>
Commit-Queue: Sigurd Meldgaard <[email protected]>

Author: devoncarew

DEPS

@@ -178,7 +178,7 @@ vars = {
   "stream_channel_rev": "f4407168b275fcde9187baefd7dbce76d0992825",
   "string_scanner_rev": "2139417ffcd0392bde3ba9bc83ee13eaa5fbed01",
   "sync_http_rev": "91c0dd5ef9a008f0277aadcfd83036f82e572d09",
-  "tar_rev": "32ceb55e673141abff4e84b99483fe5eb881c291",
+  "tar_rev": "5a1ea943e70cdf3fa5e1102cdbb9418bd9b4b81a",
   "term_glyph_rev": "19d8c08a4e81122639129c62049896021910c932",
   "test_rev": "8e8a83607d90a7a6813fa378b2d1962a2fc0d44b",
   "test_descriptor_rev": "a3db1efe3dc725dcae9ee61647d3bfc19b3231ac",