Add ignore policy to snyk

.snyk

@@ -7,7 +7,7 @@ ignore:
         reason: Patch/update unavailable
         expires: 2018-12-31T00:00:00.000Z
   'npm:chownr:20180731':
-    - hexo-yam > iltorb > prebuild-install > tar-fs > chownr:
+    - '*':
         reason: Patch/update unavailable
         expires: '2018-12-31T00:00:00.000Z'
 patch: {}

package-lock.json

@@ -1167,8 +1167,7 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "concat-map": {
           "version": "0.0.1",
@@ -1279,8 +1278,7 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1290,7 +1288,6 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1402,8 +1399,7 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1518,7 +1514,6 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",