chore(deps): bump pretty-assertions to 1.4.0

[jeertmans]

See #329

[github-actions]

Benchmark results:

group                                         before                                 changes
-----                                         ------                                 -------
count_ok/identifiers                          1.00    823.4±5.72ns   902.3 MB/sec    1.02   836.8±14.77ns   887.8 MB/sec
count_ok/keywords_operators_and_punctators    1.00      2.5±0.02µs   821.5 MB/sec    1.01      2.5±0.04µs   815.6 MB/sec
count_ok/strings                              1.00   544.8±28.89ns  1524.6 MB/sec    1.05   570.9±31.86ns  1455.0 MB/sec
iterate/identifiers                           1.00    828.8±9.26ns   896.3 MB/sec    1.00   832.9±19.85ns   892.0 MB/sec
iterate/keywords_operators_and_punctators     1.00      2.6±0.04µs   787.2 MB/sec    1.02      2.6±0.04µs   772.5 MB/sec
iterate/strings                               1.05    580.5±7.26ns  1430.8 MB/sec    1.00   552.1±30.59ns  1504.6 MB/sec