Upgrade to the latest source-map library

Constellation · Constellation · commit 3ca9e976320b · 2015-01-29T18:14:24.000+09:00
diff --git a/package.json b/package.json
@@ -37,7 +37,7 @@
         "optionator": "^0.5.0"
     },
     "optionalDependencies": {
-        "source-map": "~0.1.40"
+        "source-map": "~0.2.0"
     },
     "devDependencies": {
         "acorn-6to5": "^0.11.1-25",
