chore(deps): update dependency org.assertj:assertj-core to v3.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.assertj:assertj-core (source)	3.20.2 -> 3.21.0

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[codecov]

Codecov Report

Merging #3378 (3c6bf97) into master (d90e75b) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##              master     #3378   +/-   ##
===========================================
  Coverage     57.329%   57.329%           
  Complexity      2576      2576           
===========================================
  Files            621       621           
  Lines          34312     34312           
  Branches        5810      5810           
===========================================
  Hits           19671     19671           
  Misses         12671     12671           
  Partials        1970      1970           

Flag	Coverage Δ
AlsoSlowTests	57.329% <ø> (ø)
javaparser-core	52.989% <ø> (ø)
javaparser-symbol-solver	35.392% <ø> (ø)
jdk-10	57.322% <ø> (ø)
jdk-11	57.322% <ø> (ø)
jdk-12	57.322% <ø> (ø)
jdk-13	57.322% <ø> (ø)
jdk-14	57.316% <ø> (ø)
jdk-15	57.322% <ø> (ø)
jdk-16	57.322% <ø> (ø)
jdk-8	57.327% <ø> (ø)
jdk-9	57.316% <ø> (ø)
macos-latest	57.326% <ø> (ø)
ubuntu-latest	57.321% <ø> (ø)
windows-latest	57.326% <ø> (ø)

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