Update dependency babel-core to v6.26.2

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
babel-core (source)	dependencies	patch	6.26.0 -> 6.26.2

By merging this PR, the below vulnerabilities will be automatically resolved:

Severity	CVSS Score	CVE
High	9.1	CVE-2019-10744
High	7.4	CVE-2020-8203
High	7.2	CVE-2021-23337
Medium	6.5	CVE-2019-1010266
Medium	5.6	CVE-2018-16487
Medium	5.3	CVE-2020-28500

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Release Notes

babel/babel

v6.26.2

Compare Source

Summary

• Landed #​7812 which backported several fixes to make sourcemaps behave better
  • #​7312 - Include better mappings for arrow-transformed 'this' and 'arguments'
  • #​7378 - Include better mappings for import bindings transformed to member expressions
  • #​7761 - Re-implement inputSourceMap merging logic to more accurately reflect mappings

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