Bump through2 from 2.0.5 to 3.0.0

Bumps [through2](https://github.com/rvagg/through2) from 2.0.5 to 3.0.0.
- [Release notes](https://github.com/rvagg/through2/releases)
- [Commits](https://github.com/rvagg/through2/compare/v2.0.5...v3.0.0)
Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -99,7 +99,7 @@
     "showdown": "^1.6.4",
     "sinon": "^2.3.5",
     "stringify": "^5.1.0",
-    "through2": "^2.0.1",
+    "through2": "^3.0.0",
     "tiny-emitter": "^1.0.1",
     "uglifyify": "^3.0.1",
     "unorm": "^1.3.3",

yarn.lock

@@ -7048,6 +7048,15 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
+"readable-stream@2 || 3":
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.1.1.tgz#ed6bbc6c5ba58b090039ff18ce670515795aeb06"
+  integrity sha512-DkN66hPyqDhnIQ6Jcsvx9bFjhw214O4poMBcIMgPVpQvNy9a0e0Uhg5SqySyDKAmUlwt8LonTBz1ezOnM8pUdA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
 "readable-stream@>=1.0.33-1 <1.1.0-0", readable-stream@~1.0.17, readable-stream@~1.0.2:
   version "1.0.34"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
@@ -8355,6 +8364,14 @@ through2@^0.6.3, through2@~0.6.3:
     readable-stream ">=1.0.33-1 <1.1.0-0"
     xtend ">=4.0.0 <4.1.0-0"
 
+through2@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-3.0.0.tgz#468b461df9cd9fcc170f22ebf6852e467e578ff2"
+  integrity sha512-8B+sevlqP4OiCjonI1Zw03Sf8PuV1eRsYQgLad5eonILOdyeRsY27A/2Ze8IlvlMvq31OH+3fz/styI7Ya62yQ==
+  dependencies:
+    readable-stream "2 || 3"
+    xtend "~4.0.1"
+
 through2@~0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/through2/-/through2-0.4.2.tgz#dbf5866031151ec8352bb6c4db64a2292a840b9b"
@@ -8750,7 +8767,7 @@ useragent@^2.1.12:
     lru-cache "4.1.x"
     tmp "0.0.x"
 
-util-deprecate@~1.0.1:
+util-deprecate@^1.0.1, util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=