Upgrade js-yaml to 3.10.0.

The main fix we are wanting is outputting astral characters (emojis) as
a single escape instead of surrogate pairs: nodeca/js-yaml#368.

package.json

@@ -106,7 +106,7 @@
     "immutability-helper": "^2.0.0",
     "immutable": "^3.7.6",
     "js-base64": "^2.1.9",
-    "js-yaml": "^3.7.0",
+    "js-yaml": "^3.10.0",
     "json-loader": "^0.5.4",
     "jwt-decode": "^2.1.0",
     "localforage": "^1.4.2",

yarn.lock

@@ -4582,6 +4582,13 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
+js-yaml@^3.10.0:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.10.0.tgz#2e78441646bd4682e963f22b6e92823c309c62dc"
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
 js-yaml@^3.4.2, js-yaml@^3.4.3, js-yaml@^3.5.1, js-yaml@^3.7.0, js-yaml@^3.8.1:
   version "3.9.1"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.9.1.tgz#08775cebdfdd359209f0d2acd383c8f86a6904a0"