Upgrade to node18.x LTS release

[andrewkrug]

Node 12.x in this project is deprecated. Need to upgrade to node18.x but it would appear some dependencies don't move smoothly.

{
    "errorType": "Runtime.ImportModuleError",
    "errorMessage": "Error: Cannot find module 'chrome-aws-lambda'\nRequire stack:\n- /var/task/index.js\n- /var/runtime/UserFunction.js\n- /var/runtime/Runtime.js\n- /var/runtime/index.js",
    "stack": [
        "Runtime.ImportModuleError: Error: Cannot find module 'chrome-aws-lambda'",
        "Require stack:",
        "- /var/task/index.js",
        "- /var/runtime/UserFunction.js",
        "- /var/runtime/Runtime.js",
        "- /var/runtime/index.js",
        "    at _loadUserApp (/var/runtime/UserFunction.js:225:13)",
        "    at Object.module.exports.load (/var/runtime/UserFunction.js:300:17)",
        "    at Object.<anonymous> (/var/runtime/index.js:43:34)",
        "    at Module._compile (internal/modules/cjs/loader.js:1114:14)",
        "    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1143:10)",
        "    at Module.load (internal/modules/cjs/loader.js:979:32)",
        "    at Function.Module._load (internal/modules/cjs/loader.js:819:12)",
        "    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:75:12)",
        "    at internal/main/run_main_module.js:17:47"
    ]
}```