Finalise snapcraft.yaml

- Allow gaiacli to access host's raw-usb slot.
- Promote the package to stable.

Closes: #3714

PENDING.md

@@ -95,6 +95,7 @@ CLI flag.
 ### Gaia CLI
 
 * [\#3731](https://github.com/cosmos/cosmos-sdk/pull/3731) `keys add --interactive` bip32 passphrase regression fix
+* [\#3714](https://github.com/cosmos/cosmos-sdk/issues/3714) Fix USB raw access issues with gaiacli when installed via snap
 
 ### Gaia
 

snapcraft.yaml

@@ -4,7 +4,7 @@ summary: Gaia Daemon # 79 char long summary
 description: |
  This snap provides the Gaia daemon gaiad and the command line
  tool gaiacli.
-grade: devel # must be 'stable' to release into candidate/stable channels
+grade: stable
 confinement: strict
 
 apps:
@@ -13,7 +13,7 @@ apps:
  plugs: [home,network,network-bind]
  gaiacli:
  command: bin/gaiacli
- plugs: [home,network,network-bind]
+ plugs: [home,network,network-bind,raw-usb]
 
 parts:
  gaia: