build(deps): bump cross-fetch from 2.2.3 to 2.2.6

Bumps [cross-fetch](https://github.com/lquixada/cross-fetch) from 2.2.3 to 2.2.6.
- [Release notes](https://github.com/lquixada/cross-fetch/releases)
- [Commits](lquixada/cross-fetch@v2.2.3...v2.2.6)

---
updated-dependencies:
- dependency-name: cross-fetch
  dependency-type: indirect
...

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

yarn.lock

@@ -3312,12 +3312,12 @@ create-require@^1.1.0:
   integrity sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==
 
 cross-fetch@^2.1.0, cross-fetch@^2.1.1:
-  version "2.2.3"
-  resolved "https://registry.npmjs.org/cross-fetch/-/cross-fetch-2.2.3.tgz"
-  integrity sha512-PrWWNH3yL2NYIb/7WF/5vFG3DCQiXDOVf8k3ijatbrtnwNuhMWLC7YF7uqf53tbTFDzHIUD8oITw4Bxt8ST3Nw==
+  version "2.2.6"
+  resolved "https://registry.yarnpkg.com/cross-fetch/-/cross-fetch-2.2.6.tgz#2ef0bb39a24ac034787965c457368a28730e220a"
+  integrity sha512-9JZz+vXCmfKUZ68zAptS7k4Nu8e2qcibe7WVZYps7sAgk5R8GYTc+T1WR0v1rlP9HxgARmOX1UTIJZFytajpNA==
   dependencies:
-    node-fetch "2.1.2"
-    whatwg-fetch "2.0.4"
+    node-fetch "^2.6.7"
+    whatwg-fetch "^2.0.4"
 
 cross-fetch@^3.0.6:
   version "3.1.4"
@@ -7816,16 +7816,18 @@ node-environment-flags@1.0.6:
     object.getownpropertydescriptors "^2.0.3"
     semver "^5.7.0"
 
-node-fetch@2.1.2:
-  version "2.1.2"
-  resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-2.1.2.tgz"
-  integrity sha1-q4hOjn5X44qUR1POxwb3iNF2i7U=
-
-node-fetch@2.6.1, node-fetch@^2.6.0, node-fetch@^2.6.1:
+node-fetch@2.6.1:
   version "2.6.1"
   resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz"
   integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
 
+node-fetch@^2.6.0, node-fetch@^2.6.1, 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-fetch@~1.7.1:
   version "1.7.3"
   resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz"
@@ -10298,6 +10300,11 @@ tough-cookie@^2.3.3, tough-cookie@~2.5.0:
     psl "^1.1.28"
     punycode "^2.1.1"
 
+tr46@~0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
+  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
+
 trim-newlines@^3.0.0:
   version "3.0.1"
   resolved "https://registry.npmjs.org/trim-newlines/-/trim-newlines-3.0.1.tgz"
@@ -11283,6 +11290,11 @@ web3@1.3.6:
     web3-shh "1.3.6"
     web3-utils "1.3.6"
 
+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@1.0.32:
   version "1.0.32"
   resolved "https://registry.npmjs.org/websocket/-/websocket-1.0.32.tgz"
@@ -11307,11 +11319,19 @@ websocket@^1.0.31, websocket@^1.0.32:
     utf-8-validate "^5.0.2"
     yaeti "^0.0.6"
 
-whatwg-fetch@2.0.4:
+whatwg-fetch@^2.0.4:
   version "2.0.4"
-  resolved "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz"
+  resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz#dde6a5df315f9d39991aa17621853d720b85566f"
   integrity sha512-dcQ1GWpOD/eEQ97k66aiEVpNnapVj90/+R+SXTPYGHpYBBypfKJEQjLrvMZ7YXbKm21gXd4NcuxUTjiv1YtLng==
 
+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@^1.0.2:
   version "1.0.2"
   resolved "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz"