Update dependabot re: uv (#598)

Update dependabot and mergify configs

Author: molpopgen

.github/dependabot.yml

@@ -1,7 +1,6 @@
 version: 2
 updates:
-  - package-ecosystem: "pip"
-    directory: "/requirements/"
+  - package-ecosystem: "uv"
     schedule:
       interval: "monthly"
 

.github/mergify.yml

@@ -10,6 +10,9 @@ queue_rules:
       - check-success=tests (macos-14, 3.12)
       - check-success=tests (ubuntu-24.04, 3.12)
       - check-success=tests (windows-2022, 3.12)
+      - check-success=tests (macos-14, 3.14)
+      - check-success=tests (ubuntu-24.04, 3.14)
+      - check-success=tests (windows-2022, 3.14)
 
 pull_request_rules:
   - name: automatic merge for Dependabot pull requests
@@ -25,6 +28,9 @@ pull_request_rules:
       - check-success=tests (macos-14, 3.12)
       - check-success=tests (ubuntu-24.04, 3.12)
       - check-success=tests (windows-2022, 3.12)
+      - check-success=tests (macos-14, 3.14)
+      - check-success=tests (ubuntu-24.04, 3.14)
+      - check-success=tests (windows-2022, 3.14)
     actions:
       queue:
         name: default