chore(deps-dev): bump acorn from 6.3.0 to 7.0.0

Bumps [acorn](https://github.com/acornjs/acorn) from 6.3.0 to 7.0.0.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.3.0...7.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

web3.js/package-lock.json

@@ -4374,9 +4374,9 @@
       }
     },
     "acorn": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-      "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.0.0.tgz",
+      "integrity": "sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==",
       "dev": true
     },
     "acorn-globals": {
@@ -4387,6 +4387,14 @@
       "requires": {
         "acorn": "^6.0.1",
         "acorn-walk": "^6.0.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+          "dev": true
+        }
       }
     },
     "acorn-jsx": {
@@ -7756,6 +7764,14 @@
         "acorn": "^6.0.7",
         "acorn-jsx": "^5.0.0",
         "eslint-visitor-keys": "^1.0.0"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+          "dev": true
+        }
       }
     },
     "esprima": {
@@ -19048,6 +19064,12 @@
           "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.10.tgz",
           "integrity": "sha512-LcsGbPomWsad6wmMNv7nBLw7YYYyfdYcz6xryKYQhx89c3XXan+8Q6AJ43G5XDIaklaVkK3mE4fCb0SBvMiPSQ==",
           "dev": true
+        },
+        "acorn": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+          "dev": true
         }
       }
     },

web3.js/package.json

@@ -88,7 +88,7 @@
     "@babel/preset-flow": "^7.0.0",
     "@commitlint/config-conventional": "^8.0.0",
     "@commitlint/travis-cli": "^8.0.0",
-    "acorn": "^6.1.1",
+    "acorn": "^7.0.0",
     "babel-eslint": "10.0.2",
     "babel-plugin-module-resolver": "3.2.0",
     "codecov": "^3.0.4",