Update to electron 13 and node 16

[GuessWhoSamFoo]

What this PR does / why we need it:
Since the peer dependency requirements in angular and electron-builder now supports node 16, we can now use a single node version.

Special notes for your reviewer:
sindresorhus/electron-store#146 - electron-store is pinned to 5.2.0 due to a private label and prevents the move to future electron versions unless: a different store is used, conf is updated (which seems to have community support), or remained pinned to electron 13 before the remote module is removed.

> octant@0.24.0 build-electron
> npx tsc main.ts && npm run build -- --base-href ./

node_modules/conf/dist/source/index.d.ts:5:5 - error TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.

5     #private;
      ~~~~~~~~

Signed-off-by: GuessWhoSamFoo foos@vmware.com