Update dependency serverless to v4 (main)

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
serverless	dependencies	major	^1.47.0 -> ^4.0.0

By merging this PR, the issue #20 will be automatically resolved and closed:

Severity	CVSS Score	Vulnerability	Reachability
Critical	9.8	CVE-2020-12265
Critical	9.8	CVE-2021-44906
Critical	9.8	CVE-2021-44906
High	7.8	CVE-2021-43138
High	7.5	CVE-2019-20149
High	7.5	CVE-2021-3807
High	7.5	CVE-2021-3807
High	7.5	CVE-2022-24785
High	7.5	CVE-2022-31129
High	7.5	WS-2019-0310
High	7.5	WS-2020-0044
High	7.3	CVE-2020-7788
High	7.2	CVE-2021-23337
Medium	6.5	CVE-2020-8244
Medium	6.1	CVE-2022-0235
Medium	6.1	CVE-2022-0235
Medium	5.6	CVE-2020-7598
Medium	5.6	CVE-2020-7598
Medium	5.3	CVE-2022-25883
Low	3.7	CVE-2017-16137
Low	3.1	CVE-2025-5889
Low	2.6	CVE-2020-15168
Low	2.6	CVE-2020-15168
Low	2.5	CVE-2025-54798
Low	2.5	CVE-2025-54798

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