Reduce lfmerge container size

[rmunn]

This PR bumps the lfmerge image version in order to reduce the size of the lfmerge image. The reduced size may not be immediately visible with this PR, as it will still have to download a 700 MB layer in the Docker image. But with the changes I've made to the lfmerge build process, that should be the last time that Docker image layer has to be downloaded, and subsequent lfmerge releases should be able to reuse the same layer.

Type of Change

Only keep lines below that describe this change, then delete the rest.

• Bug fix (non-breaking change which fixes an issue)

Instructions for testing

• In the docker directory, run make.
• Pay attention to the SHA sum of the layer that's 699 MB in size.
• Now edit docker/lfmerge/Dockerfile and change version 2.0.111 to 2.0.112.
• Without running make clean, run make again.
• Pay attention to the layer whose SHA sum you noted earlier. Note that it's not re-downloading because it's already in your Docker cache.

Checklist

• I have performed a self-review of my own code
• I have reviewed the title/description of this PR which will be used as the squashed PR commit message
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works

qa.languageforge.org testing

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• Reviewer1 (YYYY-MM-DD HH:MM)
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[github-actions]

Unit Test Results

    1 files      1 suites   10s ⏱️
373 tests 373 ✔️ 0 💤 0 ❌

Results for commit 0ca6b09.