Update dependency bl to 1.2.3 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change
bl	1.2.2 -> 1.2.3

GitHub Vulnerability Alerts

CVE-2020-8244

A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.

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