diff --git a/yarn.lock b/yarn.lock
index 9a96af7..361cc01 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -110,8 +110,8 @@ acorn@^3.0.4:
   resolved "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
 acorn@^5.5.0:
-  version "5.6.1"
-  resolved "https://registry.npmjs.org/acorn/-/acorn-5.6.1.tgz#c9e50c3e3717cf897f1b071ceadbb543bbc0a8d4"
+  version "5.6.2"
+  resolved "https://registry.npmjs.org/acorn/-/acorn-5.6.2.tgz#b1da1d7be2ac1b4a327fb9eab851702c5045b4e7"
 
 ajv-keywords@^2.1.0:
   version "2.1.1"
@@ -1377,7 +1377,7 @@ growl@1.10.5:
   version "1.10.5"
   resolved "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
 
-handlebars@^4.0.2, handlebars@^4.0.3:
+handlebars@^4.0.11, handlebars@^4.0.2:
   version "4.0.11"
   resolved "https://registry.npmjs.org/handlebars/-/handlebars-4.0.11.tgz#630a35dfe0294bc281edae6ffc5d329fc7982dcc"
   dependencies:
@@ -1752,6 +1752,10 @@ istanbul-lib-coverage@^1.1.2, istanbul-lib-coverage@^1.2.0:
   version "1.2.0"
   resolved "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-1.2.0.tgz#f7d8f2e42b97e37fe796114cb0f9d68b5e3a4341"
 
+istanbul-lib-coverage@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.0.tgz#905e71212052ffb34f2eb008102230bff03940b5"
+
 istanbul-lib-hook@^1.1.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/istanbul-lib-hook/-/istanbul-lib-hook-1.1.0.tgz#8538d970372cb3716d53e55523dd54b557a8d89b"
@@ -1759,16 +1763,16 @@ istanbul-lib-hook@^1.1.0:
     append-transform "^0.4.0"
 
 istanbul-lib-instrument@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-2.1.0.tgz#76576f844cdbc4952a8b3904dae09d1eb10e6c4d"
+  version "2.2.0"
+  resolved "https://registry.npmjs.org/istanbul-lib-instrument/-/istanbul-lib-instrument-2.2.0.tgz#08091ae49d0b330be2a839dc25c250324c4bedaa"
   dependencies:
     "@babel/generator" "7.0.0-beta.49"
     "@babel/parser" "7.0.0-beta.49"
     "@babel/template" "7.0.0-beta.49"
     "@babel/traverse" "7.0.0-beta.49"
     "@babel/types" "7.0.0-beta.49"
-    istanbul-lib-coverage "^1.2.0"
-    semver "^5.3.0"
+    istanbul-lib-coverage "^2.0.0"
+    semver "^5.5.0"
 
 istanbul-lib-report@^1.1.3:
   version "1.1.3"
@@ -1790,10 +1794,10 @@ istanbul-lib-source-maps@^1.2.5:
     source-map "^0.5.3"
 
 istanbul-reports@^1.4.1:
-  version "1.4.1"
-  resolved "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-1.4.1.tgz#4f2e8e928aa7a05d1da6c427d4098b2655ec7334"
+  version "1.5.0"
+  resolved "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-1.5.0.tgz#c6c2867fa65f59eb7dcedb7f845dfc76aaee70f9"
   dependencies:
-    handlebars "^4.0.3"
+    handlebars "^4.0.11"
 
 isurl@^1.0.0-alpha5:
   version "1.0.0"
@@ -2306,8 +2310,8 @@ normalize-url@2.0.1:
     sort-keys "^2.0.0"
 
 npm-publish-git-tag@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/npm-publish-git-tag/-/npm-publish-git-tag-2.0.0.tgz#57e1bb340d4ada43f0fdeb8e16c417b82c64c795"
+  version "2.1.0"
+  resolved "https://registry.npmjs.org/npm-publish-git-tag/-/npm-publish-git-tag-2.1.0.tgz#d8aff9166096fa4a47c8e962c365623cfd8bcf2d"
   dependencies:
     bluebird "^3.5.0"
     commander "^2.9.0"
@@ -2451,8 +2455,8 @@ p-is-promise@^1.1.0:
   resolved "https://registry.npmjs.org/p-is-promise/-/p-is-promise-1.1.0.tgz#9c9456989e9f6588017b0434d56097675c3da05e"
 
 p-limit@^1.1.0:
-  version "1.2.0"
-  resolved "https://registry.npmjs.org/p-limit/-/p-limit-1.2.0.tgz#0e92b6bedcb59f022c13d0f1949dc82d15909f1c"
+  version "1.3.0"
+  resolved "https://registry.npmjs.org/p-limit/-/p-limit-1.3.0.tgz#b86bd5f0c25690911c7590fcbfc2010d54b3ccb8"
   dependencies:
     p-try "^1.0.0"
 
@@ -2870,7 +2874,7 @@ safe-regex@^1.1.0:
   dependencies:
     ret "~0.1.10"
 
-"safer-buffer@>= 2.1.2 < 3":
+"safer-buffer@>= 2.1.2 < 3", safer-buffer@^2.0.2:
   version "2.1.2"
   resolved "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
 
@@ -3002,8 +3006,8 @@ sinon-chai@^3.0.0:
   resolved "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.1.0.tgz#e8c18dd72624eb0aeb95eeee2de809a9859be2cd"
 
 sinon@^5.0.0:
-  version "5.0.10"
-  resolved "https://registry.npmjs.org/sinon/-/sinon-5.0.10.tgz#a282b36a7475664c9f98719108e5546907129023"
+  version "5.1.1"
+  resolved "https://registry.npmjs.org/sinon/-/sinon-5.1.1.tgz#19c59810ffb733ea6e76a28b94a71fc4c2f523b8"
   dependencies:
     "@sinonjs/formatio" "^2.0.0"
     diff "^3.5.0"
@@ -3146,13 +3150,14 @@ sprintf-js@~1.0.2:
   resolved "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
 
 sshpk@^1.7.0:
-  version "1.14.1"
-  resolved "https://registry.npmjs.org/sshpk/-/sshpk-1.14.1.tgz#130f5975eddad963f1d56f92b9ac6c51fa9f83eb"
+  version "1.14.2"
+  resolved "https://registry.npmjs.org/sshpk/-/sshpk-1.14.2.tgz#c6fc61648a3d9c4e764fd3fcdf4ea105e492ba98"
   dependencies:
     asn1 "~0.2.3"
     assert-plus "^1.0.0"
     dashdash "^1.12.0"
     getpass "^0.1.1"
+    safer-buffer "^2.0.2"
   optionalDependencies:
     bcrypt-pbkdf "^1.0.0"
     ecc-jsbn "~0.1.1"
@@ -3555,8 +3560,8 @@ write-json-file@^2.2.0:
     write-file-atomic "^2.0.0"
 
 write-pkg@^3.0.1:
-  version "3.1.0"
-  resolved "https://registry.npmjs.org/write-pkg/-/write-pkg-3.1.0.tgz#030a9994cc9993d25b4e75a9f1a1923607291ce9"
+  version "3.2.0"
+  resolved "https://registry.npmjs.org/write-pkg/-/write-pkg-3.2.0.tgz#0e178fe97820d389a8928bc79535dbe68c2cff21"
   dependencies:
     sort-keys "^2.0.0"
     write-json-file "^2.2.0"