Update dependency core-js to v3.4.8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
core-js	devDependencies	patch	3.4.7 -> 3.4.8

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Release Notes

zloirock/core-js

v3.4.8

Compare Source

• Added one more workaround for broken in previous versions inspectSource helper, #​719
• Added Opera Mobile compat data
• Updated Samsung Internet, iOS, old Node and Android compat data mapping
• es.string.match-all marked as completely supported in FF73
• Generate core-js-compat/modules since often we need just the list of core-js modules

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[codecov-io]

Codecov Report

Merging #154 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #154   +/-   ##
=======================================
  Coverage   88.88%   88.88%           
=======================================
  Files           1        1           
  Lines         126      126           
  Branches       19       19           
=======================================
  Hits          112      112           
  Misses          4        4           
  Partials       10       10

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