diff --git a/yarn.lock b/yarn.lock
index e934de5..400c4d9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2040,11 +2040,6 @@ commander@^2.12.1, commander@^2.8.1, commander@^2.9.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
 
-commander@~2.19.0:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
-  integrity sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==
-
 commander@~2.8.1:
   version "2.8.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.8.1.tgz#06be367febfda0c330aa1e2a072d3dc9762425d4"
@@ -3907,13 +3902,14 @@ growl@1.10.5:
   integrity sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==
 
 handlebars@^4.0.11, handlebars@^4.0.12:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.1.tgz#6e4e41c18ebe7719ae4d38e5aca3d32fa3dd23d3"
-  integrity sha512-3Zhi6C0euYZL5sM0Zcy7lInLXKQ+YLcF/olbN010mzGQ4XVm50JeyBnMqofHh696GrciGruC7kCcApPDJvVgwA==
+  version "4.7.6"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.6.tgz#d4c05c1baf90e9945f77aa68a7a219aa4a7df74e"
+  integrity sha512-1f2BACcBfiwAfStCKZNrUCgqNZkGsAT7UM3kkYtXuLo0KnaVfjKOyf7PRzB6++aK9STyT1Pd2ZCPe3EGOXleXA==
   dependencies:
+    minimist "^1.2.5"
     neo-async "^2.6.0"
-    optimist "^0.6.1"
     source-map "^0.6.1"
+    wordwrap "^1.0.0"
   optionalDependencies:
     uglify-js "^3.1.4"
 
@@ -5209,15 +5205,10 @@ minimist@0.0.8:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
   integrity sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=
 
-minimist@^1.2.0, minimist@~1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
-  integrity sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=
-
-minimist@~0.0.1:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
-  integrity sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8=
+minimist@^1.2.0, minimist@^1.2.5, minimist@~1.2.0:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
 
 minipass@^2.2.1, minipass@^2.3.4:
   version "2.3.5"
@@ -5380,9 +5371,9 @@ negotiator@0.6.1:
   integrity sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=
 
 neo-async@^2.6.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.0.tgz#b9d15e4d71c6762908654b5183ed38b753340835"
-  integrity sha512-MFh0d/Wa7vkKO3Y3LlacqAEeHK0mckVqzDieUKTT+KGxi+zIpeVsFxymkIiRpbpDziHc290Xr9A1O4Om7otoRA==
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.2.tgz#b4aafb93e3aeb2d8174ca53cf163ab7d7308305f"
+  integrity sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==
 
 nice-try@^1.0.4:
   version "1.0.5"
@@ -5639,14 +5630,6 @@ onetime@^2.0.0:
   version "2.1.1"
   resolved "git://github.com/marbleprotocol/openzeppelin-solidity.git#d1858def12328c6cdcbda6bebfc8bb8accd27610"
 
-optimist@^0.6.1:
-  version "0.6.1"
-  resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"
-  integrity sha1-2j6nRob6IaGaERwybpDrFaAZZoY=
-  dependencies:
-    minimist "~0.0.1"
-    wordwrap "~0.0.2"
-
 optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
@@ -6954,7 +6937,7 @@ source-map@^0.5.6, source-map@^0.5.7:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
-source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
+source-map@^0.6.0, source-map@^0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
@@ -7727,12 +7710,9 @@ u2f-api@0.2.7:
   integrity sha512-fqLNg8vpvLOD5J/z4B6wpPg4Lvowz1nJ9xdHcCzdUPKcFE/qNCceV2gNZxSJd5vhAZemHr/K/hbzVA0zxB5mkg==
 
 uglify-js@^3.1.4:
-  version "3.5.3"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.5.3.tgz#d490bb5347f23025f0c1bc0dee901d98e4d6b063"
-  integrity sha512-rIQPT2UMDnk4jRX+w4WO84/pebU2jiLsjgIyrCktYgSvx28enOE3iYQMr+BD1rHiitWnDmpu0cY/LfIEpKcjcw==
-  dependencies:
-    commander "~2.19.0"
-    source-map "~0.6.1"
+  version "3.10.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.10.3.tgz#f0d2f99736c14de46d2d24649ba328be3e71c3bf"
+  integrity sha512-Lh00i69Uf6G74mvYpHCI9KVVXLcHW/xu79YTvH7Mkc9zyKUeSPz0owW0dguj0Scavns3ZOh3wY63J0Zb97Za2g==
 
 ultron@~1.1.0:
   version "1.1.1"
@@ -8731,12 +8711,7 @@ wide-align@^1.1.0:
   dependencies:
     string-width "^1.0.2 || 2"
 
-wordwrap@~0.0.2:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
-  integrity sha1-o9XabNXAvAAI03I0u68b7WMFkQc=
-
-wordwrap@~1.0.0:
+wordwrap@^1.0.0, wordwrap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
   integrity sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=