diff --git a/package-lock.json b/package-lock.json
index ac00dea..85b9878 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "server-port",
-  "version": "0.0.1",
+  "version": "0.0.13",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -24,6 +24,97 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@jest/types": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+      "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "^2.0.0",
+        "@types/istanbul-reports": "^1.1.1",
+        "@types/yargs": "^13.0.0"
+      }
+    },
+    "@types/cookiejar": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.2.tgz",
+      "integrity": "sha512-t73xJJrvdTjXrn4jLS9VSGRbz0nUY3cl2DMGDU48lKl+HR9dbbjW2A9r3g40VA++mQpy6uuHg33gy7du2BKpog==",
+      "dev": true
+    },
+    "@types/istanbul-lib-coverage": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.4.tgz",
+      "integrity": "sha512-z/QT1XN4K4KYuslS23k62yDIDLwLFkzxOuMplDtObz0+y7VqJCaO2o+SPwHCvLFZh7xazvvoor2tA/hPz9ee7g==",
+      "dev": true
+    },
+    "@types/istanbul-lib-report": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-report/-/istanbul-lib-report-3.0.0.tgz",
+      "integrity": "sha512-plGgXAPfVKFoYfa9NpYDAkseG+g6Jr294RqeqcqDixSbU34MZVJRi/P+7Y8GDpzkEwLaGZZOpKIEmeVZNtKsrg==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "*"
+      }
+    },
+    "@types/istanbul-reports": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-reports/-/istanbul-reports-1.1.2.tgz",
+      "integrity": "sha512-P/W9yOX/3oPZSpaYOCQzGqgCQRXn0FFO/V8bWrCQs+wLmvVVxk6CRBXALEvNs9OHIatlnlFokfhuDo2ug01ciw==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "*",
+        "@types/istanbul-lib-report": "*"
+      }
+    },
+    "@types/jest": {
+      "version": "24.9.1",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-24.9.1.tgz",
+      "integrity": "sha512-Fb38HkXSVA4L8fGKEZ6le5bB8r6MRWlOCZbVuWZcmOMSCd2wCYOwN1ibj8daIoV9naq7aaOZjrLCoCMptKU/4Q==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^24.3.0"
+      }
+    },
+    "@types/node": {
+      "version": "18.11.18",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.18.tgz",
+      "integrity": "sha512-DHQpWGjyQKSHj3ebjFI/wRKcqQcdR+MoFBygntYOZytCqNfkd2ZC4ARDJ2DQqhjH5p85Nnd3jhUJIXrszFX/JA==",
+      "dev": true
+    },
+    "@types/superagent": {
+      "version": "4.1.16",
+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-4.1.16.tgz",
+      "integrity": "sha512-tLfnlJf6A5mB6ddqF159GqcDizfzbMUB1/DeT59/wBNqzRTNNKsaw79A/1TZ84X+f/EwWH8FeuSkjlCLyqS/zQ==",
+      "dev": true,
+      "requires": {
+        "@types/cookiejar": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/supertest": {
+      "version": "2.0.12",
+      "resolved": "https://registry.npmjs.org/@types/supertest/-/supertest-2.0.12.tgz",
+      "integrity": "sha512-X3HPWTwXRerBZS7Mo1k6vMVR1Z6zmJcDVn5O/31whe0tnjE4te6ZJSJGq1RiqHPjzPdMTfjCFogDJmwng9xHaQ==",
+      "dev": true,
+      "requires": {
+        "@types/superagent": "*"
+      }
+    },
+    "@types/yargs": {
+      "version": "13.0.12",
+      "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.12.tgz",
+      "integrity": "sha512-qCxJE1qgz2y0hA4pIxjBR+PelCH0U5CK1XJXFwCNqfmliatKp47UCXXE9Dyk1OXBDLvsCF57TqQEJaeLfDYEOQ==",
+      "dev": true,
+      "requires": {
+        "@types/yargs-parser": "*"
+      }
+    },
+    "@types/yargs-parser": {
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/@types/yargs-parser/-/yargs-parser-21.0.0.tgz",
+      "integrity": "sha512-iO9ZQHkZxHn4mSakYV0vFHAVDyEOIJQrV2uZ06HxEPcx+mt8swXoZHIbaaJ2crJYFfErySgktuTZ3BeLz+XmFA==",
+      "dev": true
+    },
     "@typescript-eslint/eslint-plugin": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-1.7.0.tgz",
@@ -280,6 +371,12 @@
       "integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==",
       "dev": true
     },
+    "diff-sequences": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-24.9.0.tgz",
+      "integrity": "sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==",
+      "dev": true
+    },
     "doctrine": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -925,6 +1022,24 @@
       "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
       "dev": true
     },
+    "jest-diff": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/jest-diff/-/jest-diff-24.9.0.tgz",
+      "integrity": "sha512-qMfrTs8AdJE2iqrTp0hzh7kTd2PQWrsFyj9tORoKmu32xjPjeE4NyjVRDz8ybYwqS2ik8N4hsIpiVTyFeo2lBQ==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.1",
+        "diff-sequences": "^24.9.0",
+        "jest-get-type": "^24.9.0",
+        "pretty-format": "^24.9.0"
+      }
+    },
+    "jest-get-type": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-24.9.0.tgz",
+      "integrity": "sha512-lUseMzAley4LhIcpSP9Jf+fTrQ4a1yHQwLNeeVa2cEmbCGeoZAtYPOIv8JaxLD/sUpKxetKGP+gsHl8f8TSj8Q==",
+      "dev": true
+    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -954,21 +1069,10 @@
       "dev": true
     },
     "json5": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-2.1.0.tgz",
-      "integrity": "sha512-8Mh9h6xViijj36g7Dxi+Y4S6hNGV96vcJZr/SrlHh1LR/pEn/8j/+qIBbs44YKl69Lrfctp4QD+AdWLTMqEZAQ==",
-      "dev": true,
-      "requires": {
-        "minimist": "^1.2.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        }
-      }
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
+      "dev": true
     },
     "levn": {
       "version": "0.3.0",
@@ -1232,6 +1336,12 @@
       "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=",
       "dev": true
     },
+    "prettier": {
+      "version": "1.19.1",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.19.1.tgz",
+      "integrity": "sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==",
+      "dev": true
+    },
     "prettier-linter-helpers": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/prettier-linter-helpers/-/prettier-linter-helpers-1.0.0.tgz",
@@ -1241,6 +1351,26 @@
         "fast-diff": "^1.1.2"
       }
     },
+    "pretty-format": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-24.9.0.tgz",
+      "integrity": "sha512-00ZMZUiHaJrNfk33guavqgvfJS30sLYf0f8+Srklv0AMPodGGHcoHgksZ3OThYnIvOd+8yMCn0YiEOogjlgsnA==",
+      "dev": true,
+      "requires": {
+        "@jest/types": "^24.9.0",
+        "ansi-regex": "^4.0.0",
+        "ansi-styles": "^3.2.0",
+        "react-is": "^16.8.4"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.1.tgz",
+          "integrity": "sha512-ILlv4k/3f6vfQ4OoP2AGvirOktlQ98ZEL1k9FaQjxa3L1abBgbuTDAdPOpvbGncC0BTVQrl+OM8xZGK6tWXt7g==",
+          "dev": true
+        }
+      }
+    },
     "progress": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
@@ -1253,6 +1383,12 @@
       "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
       "dev": true
     },
+    "react-is": {
+      "version": "16.13.1",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
+      "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==",
+      "dev": true
+    },
     "read-pkg": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-2.0.0.tgz",
diff --git a/yarn.lock b/yarn.lock
index 00705bd..db0da0a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -780,11 +780,9 @@ json-stable-stringify-without-jsonify@^1.0.1:
   integrity sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=
 
 json5@2.x:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.0.tgz#e7a0c62c48285c628d20a10b85c89bb807c32850"
-  integrity sha512-8Mh9h6xViijj36g7Dxi+Y4S6hNGV96vcJZr/SrlHh1LR/pEn/8j/+qIBbs44YKl69Lrfctp4QD+AdWLTMqEZAQ==
-  dependencies:
-    minimist "^1.2.0"
+  version "2.2.3"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.2.3.tgz#78cd6f1a19bdc12b73db5ad0c61efd66c1e29283"
+  integrity sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==
 
 levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
@@ -844,11 +842,6 @@ minimist@0.0.8:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
   integrity sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=
 
-minimist@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
-  integrity sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=
-
 mkdirp@0.x, mkdirp@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"