Bump async from 2.6.3 to 2.6.4

Bumps [async](https://github.com/caolan/async) from 2.6.3 to 2.6.4.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md)
- [Commits](caolan/async@v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: async
  dependency-type: indirect
...

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

Author: dependabot[bot]

yarn.lock

@@ -2055,9 +2055,9 @@ async-limiter@~1.0.0:
   integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
 
 async@^2.5.0, async@^2.6.2:
-  version "2.6.3"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
-  integrity sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  integrity sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==
   dependencies:
     lodash "^4.17.14"
 
@@ -6099,10 +6099,10 @@ karma@~4.0.0:
     tmp "0.0.33"
     useragent "2.3.0"
 
-katex@^0.11.1:
-  version "0.11.1"
-  resolved "https://registry.yarnpkg.com/katex/-/katex-0.11.1.tgz#df30ca40c565c9df01a466a00d53e079e84ffaa2"
-  integrity sha512-5oANDICCTX0NqYIyAiFCCwjQ7ERu3DQG2JFHLbYOf+fXaMoH8eg/zOq5WSYJsKMi/QebW+Eh3gSM+oss1H/bww==
+katex@^0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/katex/-/katex-0.12.0.tgz#2fb1c665dbd2b043edcf8a1f5c555f46beaa0cb9"
+  integrity sha512-y+8btoc/CK70XqcHqjxiGWBOeIL8upbS0peTPXTvgrh21n1RiWWcIpSWM+4uXq+IAgNh9YYQWdc7LVDPDAEEAg==
   dependencies:
     commander "^2.19.0"
 
@@ -6430,11 +6430,12 @@ markdown-escapes@^1.0.0:
   resolved "https://registry.yarnpkg.com/markdown-escapes/-/markdown-escapes-1.0.4.tgz#c95415ef451499d7602b91095f3c8e8975f78535"
   integrity sha512-8z4efJYk43E0upd0NbVXwgSTQs6cT3T06etieCMEg7dRbzCbxUCK/GHlX8mhHRDcp+OLlHkPKsvqQTCvsRl2cg==
 
-"markdown-it-katex@github:MicroDroid/markdown-it-katex":
-  version "3.0.0"
-  resolved "https://codeload.github.com/MicroDroid/markdown-it-katex/tar.gz/d6b159a38997ba628900eb9e58e34cbe950b7ccd"
+"markdown-it-katexx@3.2.0 ":
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/markdown-it-katexx/-/markdown-it-katexx-3.2.0.tgz#8ba0bf5a81268b8b7ed694d3349f473d7ecd03eb"
+  integrity sha512-fR6ZHNnQa4SzAIj8jxrEAtp3olE3bnBFlcEUk460fbCAqap0ycuS3QrQ38pK+/fHmjJZD1gmSnlkM1QfkAYCZA==
   dependencies:
-    katex "^0.11.1"
+    katex "^0.12.0"
 
 markdown-it@10.0.0:
   version "10.0.0"