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Update `package.json` version

Changelog: Last-minute entry for PR 1008 (Cirrus ARM Linux fix)

Last minute bug fix in `StyleManager` Changes

Odd this wasn't caught in our initial specs. But this issue only effects specs, as the actual production code is able to assign the callback with a function reference rather than a string which is then used to assign the callback itself.

meta: Update version in package.json to 1.115.0

cirrus: Install older dotenv gem version 2.8.1

This indirect dependency has a newer version that requires
Ruby 3.0 or newer. We're on Debian 10 "Buster" for now, which is
still on Ruby 2.5.

Pin to dotenv 2.8.1, the latest version compatible with our older Ruby,
per the error message from CI:

> The last version of dotenv (>= 0) to support your Ruby & RubyGems
> was 2.8.1. Try installing it with `gem install dotenv -v 2.8.1`
> and then running the current command again
>
> dotenv requires Ruby version >= 3.0.
> The current ruby version is 2.5.0.

Update version

Bump `package.json` version

meta: Update Pulsar version from v1.112.0-dev to v1.112.1

`1.111.0-dev` => `1.112.0`