fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-1038255

package-lock.json

@@ -1651,12 +1651,18 @@
       "dev": true
     },
     "axios": {
-      "version": "0.18.1",
-      "resolved": "https://registry.npmjs.org/axios/-/axios-0.18.1.tgz",
-      "integrity": "sha512-0BfJq4NSfQXd+SkFdrvFbG7addhYSBA2mQwISr46pD6E5iqkWg02RAs8vyTT/j0RTnoYmeXauBuSv1qKwR179g==",
+      "version": "0.21.1",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz",
+      "integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==",
       "requires": {
-        "follow-redirects": "1.5.10",
-        "is-buffer": "^2.0.2"
+        "follow-redirects": "^1.10.0"
+      },
+      "dependencies": {
+        "follow-redirects": {
+          "version": "1.13.1",
+          "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.1.tgz",
+          "integrity": "sha512-SSG5xmZh1mkPGyKzjZP8zLjltIfpW32Y5QpdNJyjcfGxK3qo3NDDkZOZSFiGn1A6SclQxY9GzEwAHQ3dmYRWpg=="
+        }
       }
     },
     "axobject-query": {
@@ -1977,11 +1983,6 @@
       "resolved": "https://registry.npmjs.org/bootstrap-sass/-/bootstrap-sass-3.4.1.tgz",
       "integrity": "sha512-p5rxsK/IyEDQm2CwiHxxUi0MZZtvVFbhWmyMOt4lLkA4bujDA1TGoKT0i1FKIWiugAdP+kK8T5KMDFIKQCLYIA=="
     },
-    "bootstrap3": {
-      "version": "npm:bootstrap@3.4.1",
-      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-3.4.1.tgz",
-      "integrity": "sha512-yN5oZVmRCwe5aKwzRj6736nSmKDX7pLYwsXiCj/EYmo16hODaBiT4En5btW/jhBF/seV+XMx3aYwukYC3A49DA=="
-    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -5316,11 +5317,6 @@
         "binary-extensions": "^1.0.0"
       }
     },
-    "is-buffer": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-2.0.4.tgz",
-      "integrity": "sha512-Kq1rokWXOPXWuaMAqZiJW4XxsmD9zGx9q4aePabbn3qCRGedtH7Cm+zV8WETitMfu1wdh+Rvd6w5egwSngUX2A=="
-    },
     "is-callable": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.0.tgz",

package.json

@@ -13,7 +13,7 @@
     "@turf/center": "^6.0.1",
     "acorn": "^7.4.1",
     "animate.css": "~3.6",
-    "axios": "^0.18.1",
+    "axios": "^0.21.1",
     "bootstrap": "~4.3",
     "bootstrap-sass": "^3.4.1",
     "bootstrap3": "npm:bootstrap@~3.4",