Ethers: use named imports

[bpierre]

This doesn’t change much at the moment (see issue on the ethers.js repo), but will make it possible to tree shake Ethers in the future.

[codecov]

Codecov Report

Merging #208 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #208   +/-   ##
=======================================
  Coverage   34.72%   34.72%           
=======================================
  Files          99       99           
  Lines        1823     1823           
  Branches      291      291           
=======================================
  Hits          633      633           
  Misses       1190     1190           

Flag	Coverage Δ
#unittests	34.72% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...connect-core/src/transactions/TransactionIntent.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/app.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/callScript.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/descriptions.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/forwarding.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/kernel.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/metadata.ts	0.00% <0.00%> (ø)
...kages/connect-core/src/utils/path/calculatePath.ts	0.00% <0.00%> (ø)
packages/connect-core/src/utils/radspec/index.ts	0.00% <ø> (ø)
packages/connect-core/src/utils/transactions.ts	0.00% <0.00%> (ø)

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[0xGabi]

LGTM!! 🙌