diff --git a/package-lock.json b/package-lock.json
index 00e52ee..9656889 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -136,7 +136,8 @@
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             "resolved": "http://npm.pdffiller.com/assert-plus/-/assert-plus-1.0.0.tgz",
             "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "assertion-error": {
             "version": "1.1.0",
@@ -532,6 +533,7 @@
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             "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
             "dev": true,
+            "optional": true,
             "requires": {
                 "delayed-stream": "~1.0.0"
             }
@@ -619,7 +621,8 @@
             "version": "0.3.6",
             "resolved": "http://npm.pdffiller.com/cssom/-/cssom-0.3.6.tgz",
             "integrity": "sha512-DtUeseGk9/GBW0hl0vVPpU22iHL6YB5BUX7ml1hB+GMpo0NX5G4voX3kdWiMSEguFtcW3Vh3djqNF4aIe6ne0A==",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "cssstyle": {
             "version": "0.2.37",
@@ -684,7 +687,8 @@
             "version": "1.0.0",
             "resolved": "http://npm.pdffiller.com/delayed-stream/-/delayed-stream-1.0.0.tgz",
             "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "detect-indent": {
             "version": "4.0.0",
@@ -1288,6 +1292,7 @@
             "version": "1.4.2",
             "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.2.tgz",
             "integrity": "sha512-eAZS2sEUMlIeCjBeubdj45dmBHQwPHWyBcT1VSYB7o9x9WRRqKxyUoiXlRjyAwzN7YEzHJlYg0NmzDRWx6GP4Q==",
+            "dev": true,
             "requires": {
                 "eslint-visitor-keys": "^1.0.0"
             }
@@ -1295,7 +1300,8 @@
         "eslint-visitor-keys": {
             "version": "1.0.0",
             "resolved": "http://npm.pdffiller.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz",
-            "integrity": "sha512-qzm/XxIbxm/FHyH341ZrbnMUpe+5Bocte9xkmFMzPMjRaZMcXww+MpBptFvtU+79L362nqiLhekCxCxDPaUMBQ=="
+            "integrity": "sha512-qzm/XxIbxm/FHyH341ZrbnMUpe+5Bocte9xkmFMzPMjRaZMcXww+MpBptFvtU+79L362nqiLhekCxCxDPaUMBQ==",
+            "dev": true
         },
         "espree": {
             "version": "6.0.0",
@@ -1381,7 +1387,8 @@
             "version": "1.3.0",
             "resolved": "http://npm.pdffiller.com/extsprintf/-/extsprintf-1.3.0.tgz",
             "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "fast-deep-equal": {
             "version": "2.0.1",
@@ -2038,7 +2045,8 @@
             "version": "0.1.1",
             "resolved": "http://npm.pdffiller.com/jsbn/-/jsbn-0.1.1.tgz",
             "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "jsdom": {
             "version": "7.2.2",
@@ -2310,13 +2318,15 @@
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             "resolved": "http://npm.pdffiller.com/mime-db/-/mime-db-1.40.0.tgz",
             "integrity": "sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA==",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "mime-types": {
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             "resolved": "http://npm.pdffiller.com/mime-types/-/mime-types-2.1.24.tgz",
             "integrity": "sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==",
             "dev": true,
+            "optional": true,
             "requires": {
                 "mime-db": "1.40.0"
             }
@@ -2740,7 +2750,8 @@
             "version": "1.1.33",
             "resolved": "http://npm.pdffiller.com/psl/-/psl-1.1.33.tgz",
             "integrity": "sha512-LTDP2uSrsc7XCb5lO7A8BI1qYxRe/8EqlRvMeEl6rsnYAqDOl8xHR+8lSAIVfrNaSAlTPTNOCgNjWcoUL3AZsw==",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "pump": {
             "version": "3.0.0",
@@ -3252,7 +3263,8 @@
             "version": "0.14.5",
             "resolved": "http://npm.pdffiller.com/tweetnacl/-/tweetnacl-0.14.5.tgz",
             "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-            "dev": true
+            "dev": true,
+            "optional": true
         },
         "type-check": {
             "version": "0.3.2",
@@ -3442,9 +3454,9 @@
             "optional": true
         },
         "y18n": {
-            "version": "4.0.0",
-            "resolved": "http://npm.pdffiller.com/y18n/-/y18n-4.0.0.tgz",
-            "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+            "version": "4.0.1",
+            "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
+            "integrity": "sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==",
             "dev": true
         },
         "yargs": {