chore: downgrade min npm version from 7 to 6

[sergavshin]

fixes #723

[codecov]

Codecov Report

Merging #744 (d44156a) into main (a55d617) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head d44156a differs from pull request most recent head 3808f0b. Consider uploading reports for the commit 3808f0b to get more accurate results

@@           Coverage Diff           @@
##             main     #744   +/-   ##
=======================================
  Coverage   99.34%   99.34%           
=======================================
  Files        1925     1925           
  Lines      177002   177024   +22     
  Branches      909      909           
=======================================
+ Hits       175849   175871   +22     
  Misses       1097     1097           
  Partials       56       56           

Impacted Files	Coverage Δ
src/address.ts	99.10% <0.00%> (-0.01%)	⬇️
src/commerce.ts	100.00% <0.00%> (ø)

[xDivisionByZerox]

I'll leave this here so anybody can have this information.
Breaking changes v6 to v7:

• automatically installing peer dependencies
• npm uses the package.exports field making it no longer possible to require() npm’s internal modules
• npx has been completely rewritten to use the npm exec command (prompt if module is not yet installed)
• the output of npm audit has significantly changed both in the human-readable and --json output styles

source: github.blog