Add nixops19_09 to default pkgs.

It's helpful to be able to use this packages when importing nix-bitcoin.

.travis.yml

@@ -32,6 +32,7 @@ env:
   # broken
   # - PKG=electrs STABLE=0
   - PKG=liquid-swap STABLE=1
+  - PKG=nixops19_09 STABLE=1
 script:
   - printf '%s (%s)\n' "$NIX_PATH" "$VER"
   - |

pkgs/default.nix

@@ -10,6 +10,7 @@
   pylightning = pkgs.python3Packages.callPackage ./pylightning { };
   liquid-swap = pkgs.python3Packages.callPackage ./liquid-swap { };
   generate-secrets = pkgs.callPackage ./generate-secrets { };
+  nixops19_09 = pkgs.callPackage ./nixops { };
 
   pinned = import ./pinned.nix;
 }