RFR: 7860: Upgrade d3-flame-graph in github to 4.1.3

[Virag Purnam]

Upgraded the d3-flame-graph from 4.0.6 to latest version 4.1.3 and updated the license accordingly.

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Commit messages:
 - 7860: Upgrade d3-flame-graph in github to 4.1.3

Changes: https://git.openjdk.org/jmc/pull/416/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=416&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-7860
  Stats: 431 lines in 3 files changed: 192 ins; 207 del; 32 mod
  Patch: https://git.openjdk.org/jmc/pull/416.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/416/head:pull/416

PR: https://git.openjdk.org/jmc/pull/416