Fix TypeScript type-check issues

package.json

@@ -84,6 +84,7 @@
     "**/@types/hapi": "^17.0.18",
     "**/@types/angular": "^1.6.56",
     "**/@types/hoist-non-react-statics": "^3.3.1",
+    "**/@types/chai": "^4.2.11",
     "**/typescript": "3.7.2",
     "**/graphql-toolkit/lodash": "^4.17.13",
     "**/hoist-non-react-statics": "^3.3.2",

src/es_archiver/actions/rebuild_all.ts

@@ -18,7 +18,7 @@
  */
 
 import { resolve, dirname, relative } from 'path';
-import { stat, rename, createReadStream, createWriteStream } from 'fs';
+import { stat, Stats, rename, createReadStream, createWriteStream } from 'fs';
 import { Readable, Writable } from 'stream';
 import { fromNode } from 'bluebird';
 import { ToolingLog } from '@kbn/dev-utils';
@@ -33,7 +33,7 @@ import {
 } from '../lib';
 
 async function isDirectory(path: string): Promise<boolean> {
-  const stats = await fromNode(cb => stat(path, cb));
+  const stats: Stats = await fromNode(cb => stat(path, cb));
   return stats.isDirectory();
 }
 

yarn.lock

@@ -3783,16 +3783,11 @@
     "@types/chai" "*"
     "@types/jquery" "*"
 
-"@types/chai@*":
+"@types/chai@*", "@types/[email protected]", "@types/chai@^4.2.11":
   version "4.2.11"
   resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.11.tgz#d3614d6c5f500142358e6ed24e1bf16657536c50"
   integrity sha512-t7uW6eFafjO+qJ3BIV2gGUyZs27egcNRkUdalkud+Qa3+kg//f129iuOFivHDXQ+vnU3fDXuwgv0cqMCbcE8sw==
 
-"@types/[email protected]":
-  version "4.2.7"
-  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.7.tgz#1c8c25cbf6e59ffa7d6b9652c78e547d9a41692d"
-  integrity sha512-luq8meHGYwvky0O7u0eQZdA7B4Wd9owUCqvbw2m3XCrCU8mplYOujMBbvyS547AxJkC+pGnd0Cm15eNxEUNU8g==
-
 "@types/chance@^1.0.0":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/@types/chance/-/chance-1.0.1.tgz#c10703020369602c40dd9428cc6e1437027116df"