chore(pnpm): add npmrc config file (#1045)

This helps keeping the settings for pnpm v7 and lockfile version
v6 in line while also using dependabot for updates. Otherwise it
would overwrite the 'autoInstallPeers' setting, as dependabot may
use a different pnpm version. This specific setting is obsolete as
soon as we update to pnpm v8.

Author: derrabauke

.npmrc

@@ -0,0 +1,3 @@
+# TODO: delete this when updating to pnpm v8
+auto-install-peers=false
+