Chore: Upgrade typescript to 3.7 (#20375)

* Chore: Upgrade typescript to 3.7

packages/grafana-ui/package.json

@@ -89,7 +89,7 @@
     "rollup-plugin-terser": "4.0.4",
     "rollup-plugin-typescript2": "0.19.3",
     "rollup-plugin-visualizer": "0.9.2",
-    "typescript": "3.6.3"
+    "typescript": "3.7.2"
   },
   "types": "src/index.ts"
 }

packages/grafana-ui/src/components/Chart/Tooltip.test.tsx

@@ -12,7 +12,7 @@ describe('Chart Tooltip', () => {
       // We need to mock getBoundingClientRect to return what DOM would actually return
       // when measuring tooltip container (wrapper with padding and content inside)
       Element.prototype.getBoundingClientRect = jest.fn(() => {
-        return { width: 100, height: 100, top: 0, left: 0, bottom: 0, right: 0 };
+        return { width: 100, height: 100, top: 0, left: 0, bottom: 0, right: 0 } as DOMRect;
       });
     });
 

packages/grafana-ui/src/slate-plugins/suggestions.tsx

@@ -6,15 +6,10 @@ import { Editor as CoreEditor } from 'slate';
 import { Plugin as SlatePlugin } from '@grafana/slate-react';
 
 import TOKEN_MARK from './slate-prism/TOKEN_MARK';
-import {
-  makeFragment,
-  TypeaheadOutput,
-  CompletionItem,
-  TypeaheadInput,
-  SuggestionsState,
-  CompletionItemGroup,
-} from '..';
 import { Typeahead } from '../components/Typeahead/Typeahead';
+import { CompletionItem, TypeaheadOutput, TypeaheadInput, SuggestionsState } from '../types/completion';
+import { makeFragment } from '../utils/slate';
+
 export const TYPEAHEAD_DEBOUNCE = 100;
 
 // Commands added to the editor by this plugin.
@@ -23,13 +18,6 @@ interface SuggestionsPluginCommands {
   applyTypeahead: (suggestion: CompletionItem) => CoreEditor;
 }
 
-export interface SuggestionsState {
-  groupedItems: CompletionItemGroup[];
-  typeaheadPrefix: string;
-  typeaheadContext: string;
-  typeaheadText: string;
-}
-
 export function SuggestionsPlugin({
   onTypeahead,
   cleanText,