Feature/config file

[kayahr]

Fixes #80

[github-actions]

Performance impact

Impact on 9 metrics when merging feature/config-file into main. Before drawing conclusion, keep in mind performance variability.

package metrics (+0.5%)

Metric	Before merge	After merge	Impact
import duration	0.2 second	0.2 second	+0.001 second / +0.5%	↗️
import memory heap used	8.9 MB	8.9 MB	+496 B / +0.006%	↗️
npm tarball size	26.5 kB	26.8 kB	+317 B / +1%	↗️
npm tarball unpacked size	115 kB	116 kB	+1.1 kB / +1%	↗️
npm tarball file count	23	23		👻

write importmap metrics (-0.3%)

Metric	Before merge	After merge	Impact
write importmap duration	0.2 second	0.2 second	-0.002 second / -1%	↘️
write importmap memory heap used	9 MB	9 MB	-1.6 kB / -0.02%	↘️
number of fs read operation	0	0		👻
number of fs write operation	8	8		👻

_{Generated by @jsenv/performance-impact during performance_impact#15428467543 on 29a7de1}

[dmail]

Very nice.

I'll merge your work into a config_file branch
Then I'll make a PR to add some unit tests to config_file branch + update the package version.