chore(): move @types under devDependencies

package-lock.json

@@ -158,7 +158,8 @@
     "@types/node": {
       "version": "12.7.5",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-12.7.5.tgz",
-      "integrity": "sha512-9fq4jZVhPNW8r+UYKnxF1e2HkDWOWKM5bC2/7c9wPV835I0aOrVbS/Hw/pWPk2uKrNXQqg9Z959Kz+IYDd5p3w=="
+      "integrity": "sha512-9fq4jZVhPNW8r+UYKnxF1e2HkDWOWKM5bC2/7c9wPV835I0aOrVbS/Hw/pWPk2uKrNXQqg9Z959Kz+IYDd5p3w==",
+      "dev": true
     },
     "@types/proxyquire": {
       "version": "1.3.28",

package.json

@@ -49,7 +49,6 @@
     "types"
   ],
   "dependencies": {
-    "@types/node": "12.7.5",
     "bech32": "^1.1.2",
     "bip174": "^1.0.1",
     "bip32": "^2.0.4",
@@ -69,6 +68,7 @@
   "devDependencies": {
     "@types/bs58": "^4.0.0",
     "@types/mocha": "^5.2.7",
+    "@types/node": "12.7.5",
     "@types/proxyquire": "^1.3.28",
     "bip39": "^3.0.2",
     "bip65": "^1.0.1",