<NME> .mergify.yml
<BEF> queue_rules:
  - name: default
    conditions:
      - check-success=test (postgres, 3.7)


pull_request_rules:
  - name: automatic merge on CI success and review
    conditions:
      - check-success=test (postgres, 3.7)
      - "#approved-reviews-by>=1"
      - "#review-requested=0"
      - "#changes-requested-reviews-by=0"
      - "#commented-reviews-by=0"
      - label=ready-to-merge
    actions:
      queue:
        method: squash
        name: default
  - name: delete head branch after merge
      - author=pyup-bot
      - check-success=Travis CI - Pull Request
      - label=dependencies
    actions:
      merge:
        method: squash
      - label=dependencies
      - "#approved-reviews-by>=1"
    actions:
      queue:
      - author~=^dependabot(|-preview)\[bot\]$
      - check-success=Travis CI - Pull Request
      - label=dependencies
    actions:
      merge:
        method: squash
      - "#approved-reviews-by>=1"
    actions:
      queue:
        method: squash
        name: default

<MSG> On Mergify add the revue by one maintainer
<DFF> @@ -21,6 +21,7 @@ pull_request_rules:
       - author=pyup-bot
       - check-success=Travis CI - Pull Request
       - label=dependencies
+      - "#approved-reviews-by>=1"
     actions:
       merge:
         method: squash
@@ -31,6 +32,7 @@ pull_request_rules:
       - author~=^dependabot(|-preview)\[bot\]$
       - check-success=Travis CI - Pull Request
       - label=dependencies
+      - "#approved-reviews-by>=1"
     actions:
       merge:
         method: squash

On Mergify add the revue by one maintainer