Revert "Dependabot: Deduplicate pip configuration"

I want Dependabot to create separate PRs for each directory and there
doesn't seem to be another way to do it.

This reverts commit 4dbb3d7.

Author: lubo

.github/dependabot.yml

@@ -29,10 +29,7 @@ updates:
     # https://github.com/dependabot/dependabot-core/issues/1778#issuecomment-1988140219
     target-branch: master
   - package-ecosystem: pip
-    directories:
-      - /bookmarkmgr
-      - /bookmarks4diff
-      - /ytm
+    directory: /bookmarkmgr
     schedule:
       interval: daily
     allow:
@@ -43,10 +40,63 @@ updates:
           - version-update:semver-minor
           - version-update:semver-patch
   - package-ecosystem: pip
-    directories:
-      - /bookmarkmgr
-      - /bookmarks4diff
-      - /ytm
+    directory: /bookmarkmgr
+    schedule:
+      interval: monthly
+    groups:
+      all:
+        patterns:
+          - '*'
+    allow:
+      - dependency-type: all
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-major
+    # Makes it possible to have another config. for the same dir.
+    # https://github.com/dependabot/dependabot-core/issues/1778#issuecomment-1988140219
+    target-branch: master
+  - package-ecosystem: pip
+    directory: /bookmarks4diff
+    schedule:
+      interval: daily
+    allow:
+      - dependency-type: all
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-minor
+          - version-update:semver-patch
+  - package-ecosystem: pip
+    directory: /bookmarks4diff
+    schedule:
+      interval: monthly
+    groups:
+      all:
+        patterns:
+          - '*'
+    allow:
+      - dependency-type: all
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-major
+    # Makes it possible to have another config. for the same dir.
+    # https://github.com/dependabot/dependabot-core/issues/1778#issuecomment-1988140219
+    target-branch: master
+  - package-ecosystem: pip
+    directory: /ytm
+    schedule:
+      interval: daily
+    allow:
+      - dependency-type: all
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-minor
+          - version-update:semver-patch
+  - package-ecosystem: pip
+    directory: /ytm
     schedule:
       interval: monthly
     groups: