Update dependabot settings (#402)

Major version changes are by definition breaking changes and dependabot
cannot change the things they break (e.g., the reason PR #398 failed tests).
Non-major changes are backwards compatible and safe to update with dependabot.

Signed-off-by: Dave Thaler <[email protected]>

Author: dthaler

.github/dependabot.yml

@@ -17,29 +17,18 @@ updates:
           - "*"
 
   - package-ecosystem: nuget
-    directory: /OrcanodeMonitor
+    directories:
+      - "/OrcanodeMonitor"
+      - "/Test"
+      - "/TransferData"
     schedule:
       interval: weekly
       day: "saturday"
     groups:
       actions:
         patterns:
           - "*"
-
-  - package-ecosystem: nuget
-    directory: /Test
-    schedule:
-      interval: daily
-    groups:
-      actions:
-        patterns:
-          - "*"
-
-  - package-ecosystem: nuget
-    directory: /TransferData
-    schedule:
-      interval: daily
-    groups:
-      actions:
-        patterns:
-          - "*"
+    ignore:
+      - dependency-name: "*"
+        update-types:
+          - "version-update:semver-major"