deps: update dependency junit:junit to v4.13.1

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
junit:junit (source)	patch	4.13 -> 4.13.1

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[codecov]

Codecov Report

Merging #290 into master will increase coverage by 10.03%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master     #290       +/-   ##
=============================================
+ Coverage     61.68%   71.72%   +10.03%     
+ Complexity      984      840      -144     
=============================================
  Files           189      149       -40     
  Lines          6063     4477     -1586     
  Branches        525      227      -298     
=============================================
- Hits           3740     3211      -529     
+ Misses         2017     1135      -882     
+ Partials        306      131      -175     

Impacted Files	Coverage Δ	Complexity Δ
...d/pubsublite/kafka/AutoValue_ProducerSettings.java
...lite/internal/wire/AutoValue_PublisherBuilder.java
.../cloud/pubsublite/AutoOneOf_ProjectIdOrNumber.java
...teUnboundedReader_PartitionedSequencedMessage.java
...m/google/cloud/pubsublite/AutoValue_TopicName.java
...wire/AutoValue_SerialBatcher_UnbatchedMessage.java
...m/google/cloud/pubsublite/AutoValue_TopicPath.java
.../com/google/cloud/pubsublite/AutoValue_Offset.java
...blite/cloudpubsub/AutoValue_PublisherSettings.java
...ogle/cloud/pubsublite/AutoValue_ProjectNumber.java
... and 30 more

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