Update chai version and lock dependencies

Fixes #678

package.json

@@ -6,7 +6,7 @@
     "babel-preset-es2015": "6.3.13",
     "babel-preset-react": "6.3.13",
     "bourbon": "https://github.com/thoughtbot/bourbon.git#v4.2.6",
-    "chai": "3.2.0",
+    "chai": "^3.5.0",
     "del": "2.2.0",
     "dir-compare": "1.3.0",
     "eslint": "3.1.1",

yarn.lock

@@ -906,9 +906,9 @@ center-align@^0.1.1:
     align-text "^0.1.3"
     lazy-cache "^1.0.3"
 
-chai@3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/chai/-/chai-3.2.0.tgz#a91c06acc01057f4f4b67ed7785bd7ff4466b2fb"
+chai@^3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/chai/-/chai-3.5.0.tgz#4d02637b067fe958bdbfdd3a40ec56fef7373247"
   dependencies:
     assertion-error "^1.0.1"
     deep-eql "^0.1.3"
@@ -1575,14 +1575,10 @@ escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
 
-[email protected], escape-string-regexp@^1.0.5:
+[email protected], escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
-escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.2.tgz#4dbc2fe674e71949caf3fb2695ce7f2dc1d9a8d1"
-
 [email protected]:
   version "1.8.1"
   resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.8.1.tgz#5a5b53af4693110bebb0867aa3430dd3b70a1018"
@@ -3454,11 +3450,7 @@ loud-rejection@^1.0.0:
     currently-unhandled "^0.4.1"
     signal-exit "^3.0.0"
 
-lru-cache@2:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
-
-[email protected]:
+lru-cache@2, [email protected]:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.2.4.tgz#6c658619becf14031d0d0b594b16042ce4dc063d"