Add goreleaser config (#107)

Notes for future self:

  - **To run a "local" release:** `goreleaser release --snapshot --clean`
  - **To check configuration file:** `goreleaser check`
  - **To create a new release:** `goreleaser release`

.goreleaser.yaml

@@ -0,0 +1,8 @@
+---
+before:
+  hooks:
+    - 'go mod tidy'
+    - 'go generate unifi/device.go'
+
+builds:
+  - skip: true