test: tsify session spec (#19604)

package.json

@@ -8,6 +8,7 @@
     "@electron/typescript-definitions": "^8.6.1",
     "@octokit/rest": "^16.3.2",
     "@primer/octicons": "^9.1.1",
+    "@types/basic-auth": "^1.1.2",
     "@types/chai": "^4.1.7",
     "@types/chai-as-promised": "^7.1.0",
     "@types/dirty-chai": "^2.0.0",
@@ -15,6 +16,7 @@
     "@types/fs-extra": "^5.0.5",
     "@types/mocha": "^5.2.6",
     "@types/node": "^12.0.10",
+    "@types/send": "^0.14.5",
     "@types/split": "^1.0.0",
     "@types/webpack": "^4.4.32",
     "@types/webpack-env": "^1.13.9",