build: add a lock.yml to control probot (#55)

.github/lock.yml

@@ -0,0 +1,38 @@
+# Configuration for Lock Threads - https://github.com/dessant/lock-threads
+
+# Number of days of inactivity before a closed issue or pull request is locked
+daysUntilLock: 7
+
+# Skip issues and pull requests created before a given timestamp. Timestamp must
+# follow ISO 8601 (`YYYY-MM-DD`). Set to `false` to disable
+# skipCreatedBefore: false
+
+# Issues and pull requests with these labels will be ignored. Set to `[]` to disable
+# exemptLabels: []
+
+# Label to add before locking, such as `outdated`. Set to `false` to disable
+# lockLabel: false
+
+# Comment to post before locking. Set to `false` to disable
+# lockComment: >
+#   This thread has been automatically locked since there has not been
+#   any recent activity after it was closed. Please open a new issue for
+#   related bugs.
+
+# Assign `resolved` as the reason for locking. Set to `false` to disable
+# setLockReason: true
+
+# Limit to only `issues` or `pulls`
+# only: issues
+
+# Optionally, specify configuration settings just for `issues` or `pulls`
+# issues:
+#   exemptLabels:
+#     - help-wanted
+#   lockLabel: outdated
+
+# pulls:
+#   daysUntilLock: 30
+
+# Repository to extend settings from
+# _extends: repo