Bump acorn from 6.0.4 to 6.4.1 in /libs/stellar-util

Bumps [acorn](https://github.com/acornjs/acorn) from 6.0.4 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.0.4...6.4.1)

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

1 files changed, 6 insertions, 6 deletions

diff --git a/libs/stellar-util/package-lock.json b/libs/stellar-util/package-lock.json
index 5c428ee..3ce73f1 100644
--- a/libs/stellar-util/package-lock.json
+++ b/libs/stellar-util/package-lock.json
@@ -15,9 +15,9 @@
       }
     },
     "acorn": {
-      "version": "6.0.4",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
-      "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "acorn-dynamic-import": {
@@ -90,7 +90,7 @@
         },
         "util": {
           "version": "0.10.3",
-          "resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+          "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
           "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
           "dev": true,
           "requires": {
@@ -186,7 +186,7 @@
       "dependencies": {
         "resolve": {
           "version": "1.1.7",
-          "resolved": "http://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
           "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
           "dev": true
         }
@@ -1085,7 +1085,7 @@
       "dependencies": {
         "string_decoder": {
           "version": "1.1.1",
-          "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
           "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
           "dev": true,
           "requires": {