Bump firebase-functions from 3.3.0 to 3.20.0 in /example/functions

Bumps [firebase-functions](https://github.com/firebase/firebase-functions) from 3.3.0 to 3.20.0.
- [Release notes](https://github.com/firebase/firebase-functions/releases)
- [Changelog](https://github.com/firebase/firebase-functions/blob/master/tsconfig.release.json)
- [Commits](firebase/firebase-functions@v3.3.0...v3.20.0)

---
updated-dependencies:
- dependency-name: firebase-functions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

example/functions/package.json

@@ -7,7 +7,7 @@
   "dependencies": {
     "cors": "^2.8.5",
     "firebase-admin": "^8.12.1",
-    "firebase-functions": "^3.3.0"
+    "firebase-functions": "^3.20.0"
   },
   "private": true
 }

example/functions/yarn.lock

@@ -212,17 +212,22 @@
   dependencies:
     "@types/node" "*"
 
+"@types/cors@^2.8.5":
+  version "2.8.12"
+  resolved "https://registry.yarnpkg.com/@types/cors/-/cors-2.8.12.tgz#6b2c510a7ad7039e98e7b8d3d6598f4359e5c080"
+  integrity sha512-vt+kDhq/M2ayberEtJcIN/hxXy1Pk+59g2FV/ZQceeaTyCtCucjL2Q7FXlFjtWn4n15KCr1NE2lNNFhp0lEThw==
+
 "@types/express-serve-static-core@*":
   version "4.0.45"
   resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.0.45.tgz#71bb1f87d7187482d0d8851f5b294458e1c78667"
   integrity sha1-cbsfh9cYdILQ2IUfWylEWOHHhmc=
   dependencies:
     "@types/node" "*"
 
-"@types/express@^4.17.0":
-  version "4.17.0"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.0.tgz#49eaedb209582a86f12ed9b725160f12d04ef287"
-  integrity sha512-CjaMu57cjgjuZbh9DpkloeGxV45CnMGlVd+XpG7Gm9QgVrd7KFq+X4HY0vM+2v0bczS48Wg7bvnMY5TN+Xmcfw==
+"@types/express@4.17.3":
+  version "4.17.3"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.3.tgz#38e4458ce2067873b09a73908df488870c303bd9"
+  integrity sha512-I8cGRJj3pyOLs/HndoP+25vOqhqWkAZsWMEmq1qXy/b/M3ppufecUwaK2/TVDVxcV61/iSdhykUjQQ2DLSrTdg==
   dependencies:
     "@types/body-parser" "*"
     "@types/express-serve-static-core" "*"
@@ -729,16 +734,17 @@ firebase-admin@^8.12.1:
     "@google-cloud/firestore" "^3.0.0"
     "@google-cloud/storage" "^4.1.2"
 
-firebase-functions@^3.3.0:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/firebase-functions/-/firebase-functions-3.3.0.tgz#8c6d909eebfa4bce1b25a2e34edfc52cc786a020"
-  integrity sha512-dP6PCG+OwR6RtFpOqwPsLnfiCr3CwXAm/SVGMbO53vDAk0nhUQ1WGAyHDYmIyMAkaLJkIKGwDnX7XmZ5+yAg7g==
+firebase-functions@^3.20.0:
+  version "3.20.0"
+  resolved "https://registry.yarnpkg.com/firebase-functions/-/firebase-functions-3.20.0.tgz#78945c167ac4a5c150cd3f40b1672a1060b11c1a"
+  integrity sha512-Srh2iW/A24ia1CUfSIz5wRxCCFN2cQX6cg6whM0zAnoJs2oBwrI8PUfB4ZKDM7alBZSwXGHJbEw+4P/gC0npUg==
   dependencies:
-    "@types/express" "^4.17.0"
+    "@types/cors" "^2.8.5"
+    "@types/express" "4.17.3"
     cors "^2.8.5"
     express "^4.17.1"
-    jsonwebtoken "^8.5.1"
     lodash "^4.17.14"
+    node-fetch "^2.6.7"
 
 foreach@^2.0.5:
   version "2.0.5"
@@ -1084,22 +1090,6 @@ jsonwebtoken@8.1.0:
     ms "^2.0.0"
     xtend "^4.0.1"
 
-jsonwebtoken@^8.5.1:
-  version "8.5.1"
-  resolved "https://registry.yarnpkg.com/jsonwebtoken/-/jsonwebtoken-8.5.1.tgz#00e71e0b8df54c2121a1f26137df2280673bcc0d"
-  integrity sha512-XjwVfRS6jTMsqYs0EsuJ4LGxXV14zQybNd4L2r0UvbVnSF9Af8x7p5MzbJ90Ioz/9TI41/hTCvznF/loiSzn8w==
-  dependencies:
-    jws "^3.2.2"
-    lodash.includes "^4.3.0"
-    lodash.isboolean "^3.0.3"
-    lodash.isinteger "^4.0.4"
-    lodash.isnumber "^3.0.3"
-    lodash.isplainobject "^4.0.6"
-    lodash.isstring "^4.0.1"
-    lodash.once "^4.0.0"
-    ms "^2.1.1"
-    semver "^5.6.0"
-
 jwa@^1.1.4:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/jwa/-/jwa-1.1.5.tgz#a0552ce0220742cd52e153774a32905c30e756e5"
@@ -1110,15 +1100,6 @@ jwa@^1.1.4:
     ecdsa-sig-formatter "1.0.9"
     safe-buffer "^5.0.1"
 
-jwa@^1.4.1:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/jwa/-/jwa-1.4.1.tgz#743c32985cb9e98655530d53641b66c8645b039a"
-  integrity sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==
-  dependencies:
-    buffer-equal-constant-time "1.0.1"
-    ecdsa-sig-formatter "1.0.11"
-    safe-buffer "^5.0.1"
-
 jwa@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/jwa/-/jwa-2.0.0.tgz#a7e9c3f29dae94027ebcaf49975c9345593410fc"
@@ -1137,14 +1118,6 @@ jws@^3.1.4:
     jwa "^1.1.4"
     safe-buffer "^5.0.1"
 
-jws@^3.2.2:
-  version "3.2.2"
-  resolved "https://registry.yarnpkg.com/jws/-/jws-3.2.2.tgz#001099f3639468c9414000e99995fa52fb478304"
-  integrity sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==
-  dependencies:
-    jwa "^1.4.1"
-    safe-buffer "^5.0.1"
-
 jws@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/jws/-/jws-4.0.0.tgz#2d4e8cf6a318ffaa12615e9dec7e86e6c97310f4"
@@ -1306,10 +1279,12 @@ negotiator@0.6.2:
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"
   integrity sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw==
 
-node-fetch@^2.2.0, node-fetch@^2.3.0, node-fetch@^2.6.0:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
-  integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
+node-fetch@^2.2.0, node-fetch@^2.3.0, node-fetch@^2.6.0, node-fetch@^2.6.7:
+  version "2.6.7"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.7.tgz#24de9fba827e3b4ae44dc8b20256a379160052ad"
+  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
+  dependencies:
+    whatwg-url "^5.0.0"
 
 node-forge@0.7.4:
   version "0.7.4"
@@ -1551,11 +1526,6 @@ safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
-semver@^5.6.0:
-  version "5.7.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.0.tgz#790a7cf6fea5459bac96110b29b60412dc8ff96b"
-  integrity sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==
-
 semver@^6.0.0:
   version "6.1.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.1.1.tgz#53f53da9b30b2103cd4f15eab3a18ecbcb210c9b"
@@ -1731,6 +1701,11 @@ toidentifier@1.0.0:
   resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
   integrity sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==
 
+tr46@~0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
+  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
+
 tslib@1.11.1:
   version "1.11.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.11.1.tgz#eb15d128827fbee2841549e171f45ed338ac7e35"
@@ -1798,6 +1773,11 @@ walkdir@^0.4.0:
   resolved "https://registry.yarnpkg.com/walkdir/-/walkdir-0.4.0.tgz#6b5a23e4416d27e713eaffc769f88944db0b95e5"
   integrity sha512-Ps0LSr9doEPbF4kEQi6sk5RgzIGLz9+OroGj1y2osIVnufjNQWSLEGIbZwW5V+j/jK8lCj/+8HSWs+6Q/rnViA==
 
+webidl-conversions@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
+  integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
+
 websocket-driver@>=0.5.1:
   version "0.6.5"
   resolved "https://registry.yarnpkg.com/websocket-driver/-/websocket-driver-0.6.5.tgz#5cb2556ceb85f4373c6d8238aa691c8454e13a36"
@@ -1810,6 +1790,14 @@ websocket-extensions@>=0.1.1:
   resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.1.tgz#76899499c184b6ef754377c2dbb0cd6cb55d29e7"
   integrity sha1-domUmcGEtu91Q3fC27DNbLVdKec=
 
+whatwg-url@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
+  integrity sha1-lmRU6HZUYuN2RNNib2dCzotwll0=
+  dependencies:
+    tr46 "~0.0.3"
+    webidl-conversions "^3.0.0"
+
 which-boxed-primitive@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/which-boxed-primitive/-/which-boxed-primitive-1.0.1.tgz#cbe8f838ebe91ba2471bb69e9edbda67ab5a5ec1"