Glossarist extension for Paneron

Tested on Node 16 (Paneron host’s version).

Release process

Update version in package.json to <next version>.
Make your changes.
Build the latest version:
```
yarn run dist
```
Test by, e.g., adding the dist directory in Paneron as local extension and opening some relevant dataset.
Repeat steps 2-4 as needed.
Tag commit:
```
git tag -s <next version>
```
Enter some brief message.
Publish to NPM:
```
cd dist && npm publish --access public
```

To upgrade key dependencies if needed:

yarn upgrade --ignore-scripts @riboseinc/paneron-extension-kit @riboseinc/paneron-registry-kit