keep bluebird as dev dependency

package.json

@@ -77,12 +77,14 @@
   },
   "devDependencies": {
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
+    "@types/bluebird": "^3.5.35",
     "@types/chai": "^4.2.18",
     "@types/mocha": "^8.2.2",
     "@types/sinon": "^10.0.0",
     "@types/webpack-env": "^1.16.0",
     "@typescript-eslint/eslint-plugin": "^4.24.0",
     "@typescript-eslint/parser": "^4.24.0",
+    "bluebird": "^3.7.2",
     "browserify-versionify": "^1.0.6",
     "chai": "^4.3.4",
     "es6-map": "^0.1.5",

test/entry.ts

@@ -7,5 +7,6 @@
 
 /// <reference types="mocha" />
 
+import "bluebird";
 import "es6-symbol";
 import "es6-map";

yarn.lock

@@ -324,6 +324,11 @@
   resolved "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz#8da5c6530915653f3a1f38fd5f101d8c3f8079c5"
   integrity sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==
 
+"@types/bluebird@^3.5.35":
+  version "3.5.35"
+  resolved "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.35.tgz#3964c48372bf62d60616d8673dd77a9719ebac9b"
+  integrity sha512-2WeeXK7BuQo7yPI4WGOBum90SzF/f8rqlvpaXx4rjeTmNssGRDHWf7fgDUH90xMB3sUOu716fUK5d+OVx0+ncQ==
+
 "@types/chai@^4.2.18":
   version "4.2.18"
   resolved "https://registry.npmjs.org/@types/chai/-/chai-4.2.18.tgz#0c8e298dbff8205e2266606c1ea5fbdba29b46e4"
@@ -1102,6 +1107,11 @@ bl@^4.0.3:
     inherits "^2.0.4"
     readable-stream "^3.4.0"
 
+bluebird@^3.7.2:
+  version "3.7.2"
+  resolved "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
+  integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
+
 [email protected], body-parser@^1.19.0:
   version "1.19.0"
   resolved "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"