Update and re-apply pre-commit (#216)

.pre-commit-config.yaml

@@ -1,12 +1,12 @@
 exclude: iqe/data/plugin_skel
 repos:
 - repo: https://github.com/asottile/reorder_python_imports
-  rev: v2.5.0
+  rev: v2.6.0
   hooks:
   - id: reorder-python-imports
     language_version: python3
 - repo: https://github.com/ambv/black
-  rev: 21.5b1
+  rev: 21.9b0
   hooks:
   - id: black
     args: [--safe, --quiet, --line-length, "100"]
@@ -29,12 +29,12 @@ repos:
     language_version: python3
     args: [--max-line-length, "100", --ignore, "E203, W503"]
 - repo: https://github.com/asottile/pyupgrade
-  rev: v2.16.0
+  rev: v2.29.0
   hooks:
   - id: pyupgrade
     language_version: python3
 - repo: https://github.com/pre-commit/mirrors-eslint
-  rev: v7.26.0
+  rev: v8.0.0-rc.0
   hooks:
   - id: eslint
     additional_dependencies:

backend/ibutsu_server/widgets/jenkins_heatmap.py

@@ -28,8 +28,8 @@ def _calculate_slope(x_data):
     x_avg = sum(x_data) / len(x_data)
     y_avg = sum(y_data) / len(y_data)
     try:
-        slope = sum([(x - x_avg) * (y - y_avg) for x, y in zip(x_data, y_data)]) / sum(
-            [(x - x_avg) ** 2 for x in x_data]
+        slope = sum((x - x_avg) * (y - y_avg) for x, y in zip(x_data, y_data)) / sum(
+            (x - x_avg) ** 2 for x in x_data
         )
     except ZeroDivisionError:
         slope = 0
@@ -74,7 +74,7 @@ def _get_builds(job_name, builds, project=None, additional_filters=None):
     builds = [build for build in query.limit(builds)]
     min_start_times = [build.min_start_time for build in builds]
     if min_start_times:
-        min_start_time = min([build.min_start_time for build in builds])
+        min_start_time = min(build.min_start_time for build in builds)
     else:
         min_start_time = None
     return min_start_time, [str(build.build_number) for build in builds]