update lockfile

yarn.lock

@@ -1567,9 +1567,9 @@ isbinaryfile@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/isbinaryfile/-/isbinaryfile-3.0.2.tgz#4a3e974ec0cba9004d3fc6cde7209ea69368a621"
 
-isexe@^1.1.1:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/isexe/-/isexe-1.1.2.tgz#36f3e22e60750920f5e7241a476a8c6a42275ad0"
+isexe@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
 
 isobject@^2.0.0:
   version "2.1.0"
@@ -1595,8 +1595,8 @@ istanbul-lib-coverage@^1.0.0:
   resolved "https://registry.yarnpkg.com/istanbul-lib-coverage/-/istanbul-lib-coverage-1.0.1.tgz#f263efb519c051c5f1f3343034fc40e7b43ff212"
 
 istanbul-lib-instrument@^1.1.3:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.6.1.tgz#6c9c3191ebd5aa856d66dc2f0b2f719c3732de2d"
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.6.2.tgz#dac644f358f51efd6113536d7070959a0111f73b"
   dependencies:
     babel-generator "^6.18.0"
     babel-template "^6.16.0"
@@ -2006,15 +2006,15 @@ miller-rabin@^4.0.0:
     bn.js "^4.0.0"
     brorand "^1.0.1"
 
-mime-db@~1.26.0:
-  version "1.26.0"
-  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.26.0.tgz#eaffcd0e4fc6935cf8134da246e2e6c35305adff"
+mime-db@~1.27.0:
+  version "1.27.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.27.0.tgz#820f572296bbd20ec25ed55e5b5de869e5436eb1"
 
 mime-types@^2.1.12, mime-types@~2.1.11, mime-types@~2.1.13, mime-types@~2.1.7:
-  version "2.1.14"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.14.tgz#f7ef7d97583fcaf3b7d282b6f8b5679dab1e94ee"
+  version "2.1.15"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.15.tgz#a4ebf5064094569237b8cf70046776d09fc92aed"
   dependencies:
-    mime-db "~1.26.0"
+    mime-db "~1.27.0"
 
 mime@^1.2.11, mime@^1.3.4:
   version "1.3.4"
@@ -3022,12 +3022,13 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.2.1.tgz#4862b662b988a4c8ff691cc7969622d24db76ae9"
 
 uglify-js@^2.6, uglify-js@^2.8.5:
-  version "2.8.14"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.14.tgz#25b15d1af39b21752ee33703adbf432e8bc8f77d"
+  version "2.8.15"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.15.tgz#835dd4cd5872554756e6874508d0d0561704d94d"
   dependencies:
     source-map "~0.5.1"
-    uglify-to-browserify "~1.0.0"
     yargs "~3.10.0"
+  optionalDependencies:
+    uglify-to-browserify "~1.0.0"
 
 uglify-to-browserify@~1.0.0:
   version "1.0.2"
@@ -3182,10 +3183,10 @@ which-module@^1.0.0:
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
 
 which@^1.1.1, which@^1.2.1:
-  version "1.2.12"
-  resolved "https://registry.yarnpkg.com/which/-/which-1.2.12.tgz#de67b5e450269f194909ef23ece4ebe416fa1192"
+  version "1.2.14"
+  resolved "https://registry.yarnpkg.com/which/-/which-1.2.14.tgz#9a87c4378f03e827cecaf1acdf56c736c01c14e5"
   dependencies:
-    isexe "^1.1.1"
+    isexe "^2.0.0"
 
 wide-align@^1.1.0:
   version "1.1.0"