Add maerteijn as member

[tim-schilling]

Closes django-commons/membership#31

[github-actions]

Terraform plan in terraform
With var files: terraform/production/org.tfvars terraform/production/repositories.tfvars
With variables: github_token = (sensitive value)

Plan: 1 to add, 4 to change, 0 to destroy.

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
+   create
!~  update in-place

Terraform will perform the following actions:

  # github_membership.this["maerteijn"] will be created
+   resource "github_membership" "this" {
+       downgrade_on_destroy = false
+       etag                 = (known after apply)
+       id                   = (known after apply)
+       role                 = "member"
+       username             = "maerteijn"
    }

  # github_repository.this[".github"] will be updated in-place
!~  resource "github_repository" "this" {
        id                          = ".github"
        name                        = ".github"
!~      squash_merge_commit_message = "BLANK" -> "COMMIT_MESSAGES"
!~      squash_merge_commit_title   = "PR_TITLE" -> "COMMIT_OR_PR_TITLE"
#        (35 unchanged attributes hidden)

#        (1 unchanged block hidden)
    }

  # github_repository.this["controls"] will be updated in-place
!~  resource "github_repository" "this" {
!~      allow_squash_merge          = false -> true
!~      delete_branch_on_merge      = false -> true
        id                          = "controls"
+       merge_commit_message        = "PR_TITLE"
+       merge_commit_title          = "MERGE_MESSAGE"
        name                        = "controls"
+       squash_merge_commit_message = "COMMIT_MESSAGES"
+       squash_merge_commit_title   = "COMMIT_OR_PR_TITLE"
#        (31 unchanged attributes hidden)

#        (1 unchanged block hidden)
    }

  # github_repository.this["django-commons-playground"] will be updated in-place
!~  resource "github_repository" "this" {
        id                          = "django-commons-playground"
        name                        = "django-commons-playground"
!~      squash_merge_commit_message = "BLANK" -> "COMMIT_MESSAGES"
!~      squash_merge_commit_title   = "PR_TITLE" -> "COMMIT_OR_PR_TITLE"
#        (35 unchanged attributes hidden)

#        (1 unchanged block hidden)
    }

  # github_repository.this["membership"] will be updated in-place
!~  resource "github_repository" "this" {
!~      allow_squash_merge          = false -> true
!~      delete_branch_on_merge      = false -> true
        id                          = "membership"
+       merge_commit_message        = "PR_TITLE"
+       merge_commit_title          = "MERGE_MESSAGE"
        name                        = "membership"
+       squash_merge_commit_message = "COMMIT_MESSAGES"
+       squash_merge_commit_title   = "COMMIT_OR_PR_TITLE"
#        (31 unchanged attributes hidden)

#        (1 unchanged block hidden)
    }

Plan: 1 to add, 4 to change, 0 to destroy.

📝 Plan generated in Plan org changes and list them in a PR #34