build(npm): require Node 10.18.0 or newer

Author: KaiSchwarz-cnic

package.json

@@ -9,7 +9,7 @@
     },
     "license": "MIT",
     "engines": {
-        "node": ">=8.16.0"
+        "node": ">=10.18.0"
     },
     "homepage": "https://github.com/hexonet/java-sdk",
     "repository": "github:hexonet/java-sdk",
@@ -43,4 +43,4 @@
         "@semantic-release/git": "^7.0.16",
         "semantic-release": "^15.13.18"
     }
-}
+}