Bump sqlfluff from 0.6.6 to 0.8.1 in /dependencies (#2104)

Bumps [sqlfluff](https://github.com/sqlfluff/sqlfluff) from 0.6.6 to 0.8.1.
- [Release notes](https://github.com/sqlfluff/sqlfluff/releases)
- [Changelog](https://github.com/sqlfluff/sqlfluff/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sqlfluff/sqlfluff/compare/0.6.6...0.8.1)

---
updated-dependencies:
- dependency-name: sqlfluff
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dependencies/Pipfile.lock

@@ -1149,11 +1149,11 @@
         },
         "sqlfluff": {
             "hashes": [
-                "sha256:c35c7c425b614093c8fdde006419f647db28aa3b39ac946419be07dacd1ac48e",
+                "sha256:39153878d330d8941e2b5bc8bb061cfeee25ca071320140311aa9fd43a175889",
-                "sha256:cbd53bae00ea677185cff77d51337b47eb4c747ef462883efe1325fe58d9bb07"
+                "sha256:3b219620db31cde137942b859320937e584981ad06402a3c4fa03128beb83cdc"
             ],
             "index": "pypi",
-            "version": "==0.6.6"
+            "version": "==0.8.1"
         },
         "stopit": {
             "hashes": [
@@ -1199,6 +1199,14 @@
             ],
             "version": "==1.7"
         },
+        "tqdm": {
+            "hashes": [
+                "sha256:8dd278a422499cd6b727e6ae4061c40b48fce8b76d1ccbf5d34fca9b7f925b0c",
+                "sha256:d359de7217506c9851b7869f3708d8ee53ed70a1b8edbba4dbcb47442592920d"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==4.62.3"
+        },
         "traitlets": {
             "hashes": [
                 "sha256:059f456c5a7c1c82b98c2e8c799f39c9b8128f6d0d46941ee118daace9eb70c7",