spark-wallet: use nodejs 14 instead of 12 since latter is EOL

pkgs/spark-wallet/composition.nix

@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-12_x"}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-14_x"}:
 
 let
   nodeEnv = import "${toString pkgs.path}/pkgs/development/node-packages/node-env.nix" {

pkgs/spark-wallet/generate.sh

@@ -28,8 +28,11 @@ tar xvf $TMPDIR/$file -C $src --strip-components 1 >/dev/null
 jq '.dependencies["qrcode-terminal"] = .optionalDependencies["qrcode-terminal"]' $src/package.json | sponge $src/package.json
 
 # Generate nix pkg
+# TODO-EXTERNAL: remove --nodejs-14 option once
+# https://github.com/svanderburg/node2nix/pull/296 has made its way into a
+# node2nix release.
 node2nix \
-  --nodejs-12 \
+  --nodejs-14 \
   --input $src/package.json \
   --lock $src/npm-shrinkwrap.json \
   --composition composition.nix \