update rst2html

package.json

@@ -154,7 +154,7 @@
     "react-select": "^1.1.0",
     "react-sizeme": "^2.3.6",
     "remarkable": "^1.7.1",
-    "rst2html": "github:thoward/rst2html#d6e2f21",
+    "rst2html": "github:thoward/rst2html#990cb89",
     "rxjs": "^5.4.3",
     "tether": "^1.4.0",
     "tether-drop": "https://github.com/torkelo/drop",

yarn.lock

@@ -8834,9 +8834,9 @@ rst-selector-parser@^2.2.3:
     lodash.flattendeep "^4.4.0"
     nearley "^2.7.10"
 
-"rst2html@github:thoward/rst2html#d6e2f21":
+"rst2html@github:thoward/rst2html#990cb89":
   version "1.0.4"
-  resolved "https://codeload.github.com/thoward/rst2html/tar.gz/d6e2f219ea94ec7b1fe3cc918d152b67015ab04e"
+  resolved "https://codeload.github.com/thoward/rst2html/tar.gz/990cb89f2a300cdd9151790be377c4c0840df809"
   dependencies:
     restructured "0.0.11"