monaco-editor depends on monaco-editor-core types

[remcohaszing]

The types defined by monaco-editor/esm/vs/language/json/fillers/monaco-editor-core.d.ts re-exports everything from the monaco-editor-core package. It should export types from ../../../editor/editor.api instead, just like the JS file the types are for.

#2451 would also fix it.

monaco-editor version: 0.23.0
Browser: N/A
OS: Ubuntu 20.10
Playground code that reproduces the issue: N/A

import 'monaco-editor/esm/vs/language/json/monaco.contribution';

$ node_modules/.bin/tsc
node_modules/monaco-editor/esm/vs/language/json/fillers/monaco-editor-core.d.ts:1:15 - error TS2307: Cannot find module 'monaco-editor-core' or its corresponding type declarations.

1 export * from 'monaco-editor-core';
                ~~~~~~~~~~~~~~~~~~~~

node_modules/monaco-editor/esm/vs/language/json/monaco.contribution.d.ts:1:10 - error TS2305: Module '"./fillers/monaco-editor-core"' has no exported member 'IEvent'.

1 import { IEvent } from './fillers/monaco-editor-core';
           ~~~~~~


Found 2 errors.