Add type-hints to Runner

[basnijholt]

Description

Please include a summary of the change and which (if so) issue is fixed.

Fixes #(ISSUE_NUMBER_HERE)

Checklist

• Fixed style issues using pre-commit run --all (first install using pip install pre-commit)
• pytest passed

Type of change

Check relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• (Code) style fix or documentation update
• This change requires a documentation update

[codecov-commenter]

Codecov Report

Merging #370 (cb77432) into main (28d4c35) will increase coverage by 0.05%.
The diff coverage is 88.73%.

@@ Coverage Diff @@## main #370 +/- ##
==========================================
+ Coverage 77.88% 77.94% +0.05% 
==========================================
Files 37 37 Lines 5508 5526 +18 Branches 989 989 ==========================================
+ Hits 4290 4307 +17 - Misses 1066 1067 +1 
Partials 152 152 

Impacted Files	Coverage Δ
adaptive/utils.py	61.20% <84.61%> (+2.95%)	⬆️
adaptive/runner.py	68.89% <89.65%> (+0.16%)	⬆️
adaptive/learner/average_learner1D.py	74.75% <0.00%> (+0.66%)	⬆️

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