Update @iobroker/adapter-core requirement from ^2.6.7 to ^2.6.8

[dependabot[bot]]

Updates the requirements on @iobroker/adapter-core to permit the latest version.

Release notes

Sourced from @​iobroker/adapter-core's releases.

Release v2.6.8

• (Apollon77) Expose more JS-Controller internals under the commonTools export

Commits

• 28947f1 chore: release v2.6.8
• 2d4fe30 * update license years
• 79a5341 * prepare release
• 34c5b5d Revert "* expose installNodeModule and uninstallNodeModule too, address #408"
• 9d9af4d chore(deps-dev): bump eslint from 8.26.0 to 8.35.0 (#536)
• 7625222 chore(deps-dev): bump prettier from 2.7.1 to 2.8.4 (#535)
• 057d6e0 chore(deps-dev): bump rimraf from 3.0.2 to 4.1.2 (#537)
• 5e50862 chore(deps-dev): bump @​typescript-eslint/eslint-plugin (#539)
• 0e5a841 chore(deps-dev): bump @​typescript-eslint/parser from 5.38.1 to 5.53.0 (#534)
• bda007e chore(deps-dev): bump typescript from 4.9.3 to 4.9.5 (#532)
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