Add type for injectableStore

[peytondmurray]

Problem

The JupyterContextType contains an injectableStore entry, which is the redux store for the jupyter-react. The type of injectableStore is currently any, which bypasses static type checking and triggers errors when linted with tslint:

• @typescript-eslint/no-unsafe-assignment: If you use object destructuring on the useJupyter hook to access injectableStore
• @typescript-eslint/no-unsafe-member-access: If you try to call injectableStore.dispatch()
• @typescript-eslint/no-unsafe-call: If you try to call injectableStore.dispatch()

Proposed Solution

• Add a type to the injectableStore. In Store.ts, could we have

export type AppStore = typeof injectableStore;

?

[echarles]

To avoid users of this library to have to import a lot of jupyterlab packages while initialising the Redux store, a injectable store has been implemented to allow to lazy construct that Redux store. If we type injectableStore, the initial bundle will have to pull a lot of jupyterlab packages, which will weight a lot in the initial application loading.

We can think on how to tackle that to give a better experience, so let's leave this issue open for further discussion.

[echarles]

injectableStore is now typed as InjectableStore, done in 469dfe7#diff-8fbf114973d6ded92d50de4776da769a050b603b19bd3a5d463f2f8276356dee

Closing. Thx @peytondmurray