diff --git a/yarn.lock b/yarn.lock
index ae4be83..cdce424 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10,10 +10,6 @@ ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
 
-any-promise@^1.0.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
-
 asn1@~0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.3.tgz#dac8787713c9966849fc8180777ebe9c1ddf3b86"
@@ -38,10 +34,6 @@ aws4@^1.2.1:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.5.0.tgz#0a29ffb79c31c9e712eeb087e8e7a64b4a56d755"
 
-balanced-match@^0.4.1:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
-
 bcrypt-pbkdf@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.0.tgz#3ca76b85241c7170bf7d9703e7b9aa74630040d4"
@@ -58,13 +50,6 @@ boom@2.x.x:
   dependencies:
     hoek "2.x.x"
 
-brace-expansion@^1.0.0:
-  version "1.1.6"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.6.tgz#7197d7eaa9b87e648390ea61fc66c84427420df9"
-  dependencies:
-    balanced-match "^0.4.1"
-    concat-map "0.0.1"
-
 caseless@~0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.11.0.tgz#715b96ea9841593cc33067923f5ec60ebda4f7d7"
@@ -91,10 +76,6 @@ commander@^2.9.0:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
-concat-map@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
-
 cryptiles@2.x.x:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
@@ -145,29 +126,6 @@ form-data@~2.1.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
-fs-extra@^0.26.5:
-  version "0.26.7"
-  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.26.7.tgz#9ae1fdd94897798edab76d0918cf42d0c3184fa9"
-  dependencies:
-    graceful-fs "^4.1.2"
-    jsonfile "^2.1.0"
-    klaw "^1.0.0"
-    path-is-absolute "^1.0.0"
-    rimraf "^2.2.8"
-
-fs-promise@^0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/fs-promise/-/fs-promise-0.5.0.tgz#4347d6bf624655a7061a4319213c393276ad3ef3"
-  dependencies:
-    any-promise "^1.0.0"
-    fs-extra "^0.26.5"
-    mz "^2.3.1"
-    thenify-all "^1.6.0"
-
-fs.realpath@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
-
 generate-function@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/generate-function/-/generate-function-2.0.0.tgz#6858fe7c0969b7d4e9093337647ac79f60dfbe74"
@@ -184,21 +142,6 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
-glob@^7.0.5:
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.1.tgz#805211df04faaf1c63a3600306cdf5ade50b2ec8"
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.2"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
-graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
-  version "4.1.11"
-  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
-
 "graceful-readlink@>= 1.0.0":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
@@ -239,17 +182,6 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
-inflight@^1.0.4:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
-  dependencies:
-    once "^1.3.0"
-    wrappy "1"
-
-inherits@2:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
-
 is-my-json-valid@^2.12.4:
   version "2.15.0"
   resolved "https://registry.yarnpkg.com/is-my-json-valid/-/is-my-json-valid-2.15.0.tgz#936edda3ca3c211fd98f3b2d3e08da43f7b2915b"
@@ -289,12 +221,6 @@ json-stringify-safe@~5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"
 
-jsonfile@^2.1.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-2.4.0.tgz#3736a2b428b87bbda0cc83b53fa3d633a35c2ae8"
-  optionalDependencies:
-    graceful-fs "^4.1.6"
-
 jsonpointer@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/jsonpointer/-/jsonpointer-4.0.1.tgz#4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9"
@@ -307,15 +233,9 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.3.6"
 
-klaw@^1.0.0:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/klaw/-/klaw-1.3.1.tgz#4088433b46b3b1ba259d78785d8e96f73ba02439"
-  optionalDependencies:
-    graceful-fs "^4.1.9"
-
 lodash@^4.13.1:
-  version "4.17.3"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.3.tgz#557ed7d2a9438cac5fd5a43043ca60cb455e01f7"
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 mime-db@~1.25.0:
   version "1.25.0"
@@ -327,38 +247,10 @@ mime-types@^2.1.12, mime-types@~2.1.7:
   dependencies:
     mime-db "~1.25.0"
 
-minimatch@^3.0.2:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
-  dependencies:
-    brace-expansion "^1.0.0"
-
-mz@^2.3.1:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/mz/-/mz-2.6.0.tgz#c8b8521d958df0a4f2768025db69c719ee4ef1ce"
-  dependencies:
-    any-promise "^1.0.0"
-    object-assign "^4.0.1"
-    thenify-all "^1.0.0"
-
 oauth-sign@~0.8.1:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
-object-assign@^4.0.1:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
-
-once@^1.3.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
-  dependencies:
-    wrappy "1"
-
-path-is-absolute@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
-
 pinkie-promise@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
@@ -377,12 +269,6 @@ qs@~6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.0.tgz#f403b264f23bc01228c74131b407f18d5ea5d442"
 
-read-last-lines@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/read-last-lines/-/read-last-lines-1.1.0.tgz#b290fe37a398d368321677f71325cca3b38fe95f"
-  dependencies:
-    fs-promise "^0.5.0"
-
 request-promise-core@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/request-promise-core/-/request-promise-core-1.1.1.tgz#3eee00b2c5aa83239cfb04c5700da36f81cd08b6"
@@ -422,12 +308,6 @@ request@2.79.0:
     tunnel-agent "~0.4.1"
     uuid "^3.0.0"
 
-rimraf@^2.2.8:
-  version "2.5.4"
-  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
-  dependencies:
-    glob "^7.0.5"
-
 sntp@1.x.x:
   version "1.0.9"
   resolved "https://registry.yarnpkg.com/sntp/-/sntp-1.0.9.tgz#6541184cc90aeea6c6e7b35e2659082443c66198"
@@ -471,18 +351,6 @@ supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
 
-thenify-all@^1.0.0, thenify-all@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/thenify-all/-/thenify-all-1.6.0.tgz#1a1918d402d8fc3f98fbf234db0bcc8cc10e9726"
-  dependencies:
-    thenify ">= 3.1.0 < 4"
-
-"thenify@>= 3.1.0 < 4":
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/thenify/-/thenify-3.2.1.tgz#251fd1c80aff6e5cf57cb179ab1fcb724269bd11"
-  dependencies:
-    any-promise "^1.0.0"
-
 tough-cookie@~2.3.0:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.2.tgz#f081f76e4c85720e6c37a5faced737150d84072a"
@@ -507,10 +375,6 @@ verror@1.3.6:
   dependencies:
     extsprintf "1.0.2"
 
-wrappy@1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
-
 xtend@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"