Upgrade the usage of node versions

[timea-solid]

repo	webpack	node	other steps	dependencies
rdflib	v4	12, 14, 16	save 14, gh-pages
solid-logic		12, 14, 16		rdflib
pane-registry		12, 14, 16		rdflib, solid-logic
solid-ui	v4	12, 14, 15	save 14, gh-pages	rdflib, solid-logic, pane-registry
activitystreams-pane	v4	12, 14, 16		rdflib, solid-logic, pane-registry, solid-ui
chat-pane	v4	12, 14, 16		rdflib, solid-ui
contacts-pane		12, 14, 16	save 14	rdflib, pane-registry, solid-ui
folder-pane		12, 14, 16		rdflib, solid-ui
issue-pane		12, 14, 16		rdflib, pane-registry, solid-ui
meeting-pane	v4	12, 14, 16		rdflib, solid-ui
profile-pane	v5	12, 14, 16	save 14	contacts-pane, rdflib, solid-logic, pane-registry, solid-ui
source-pane		12, 14, 16		solid-ui
solid-panes	v5	12, 14, 16
mashlib	v4	12, 14, 16	save 14, gh-pages	rdflib, solid-ui, solid-panes
SolidOS	v?	12, 14, 16	save 14, gh-pages

Previous version: https://github.com/solid/solidos/issues/116

[timea-solid]

List of repos which have updated node versions:

• [x] rdflib: https://github.com/linkeddata/rdflib.js/pull/552
• [x] solid-logic: https://github.com/solid/solid-logic/pull/31
• [x] pane-registry: https://github.com/solid/pane-registry/pull/20
• [x] solid-ui: https://github.com/solid/solid-ui/pull/481
• [x] activitystreams-pane: https://github.com/solid/activitystreams-pane/pull/14
• [x] chat-pane: https://github.com/solid/chat-pane/pull/75
• [x] contacts-pane: https://github.com/solid/contacts-pane/pull/64
• [x] folder-pane: https://github.com/solid/folder-pane/pull/29
• [x] issue-pane: https://github.com/solid/issue-pane/pull/55
• [x] meeting-pane: https://github.com/solid/meeting-pane/pull/47
• [x] profile-pane: https://github.com/solid/profile-pane/pull/30
• [x] source-pane: https://github.com/solid/source-pane/pull/30
• [x] solid-panes: https://github.com/solid/solid-panes/pull/342
• [x] mashlib : https://github.com/solid/mashlib/pull/157
• [x] NSS: https://github.com/solid/node-solid-server/pull/1685
• [x] SolidOS: https://github.com/solid/solidos/pull/141

[timea-solid]

All these changes streamline the usage of node across SolidOS stack. CI will build the repos on node 14 and 16 (NSS also on node 12) BUT, as it was before already, only the node version 14 is published to NPM (nothing changed here). Locally, when we develop the code, we should use node 16 and in June node 18 (when it is released) -> this is reflected in the .nvmrc file of each repo. One can simply make use of it by typing nvm use in the root of the repo or simply do nvm use 16.