v6.8.0

📚 PR:

• #915 Adding path case sensitivity to docs (#916)
• Fix link on pretty document (#927)
• pass merging object to mixins (#926)
• address destructuring mergeObject in docs (#928)
• doc: fix wrong link to logger.level (#929)
• docs/transport: add pino-gelf (#934)
• Support Babel/Typescript "faux modules" as well as native ESM (#936)