chore(deps): update dependency openpgpjs/openpgpjs to v5.4.0

This MR contains the following updates:

Package	Update	Change
openpgpjs/openpgpjs	minor	v5.3.1 -> v5.4.0

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Release Notes

openpgpjs/openpgpjs

v5.4.0

Compare Source

• Fix CleartextMessage signature generation over text with trailing whitespace and \r\n line endings (#​1548)
• Throw in encryptSessionKey if no keys or passwords are provided (#​1547)
• TypeScript: add missing allowInsecureVerificationWithReformattedKeys field to Config (#​1551)

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