Bump version of analysis-pom to 4.1.0 (and codingstyle to 1.4.0)

[uhafner]

Replace Nullable with CheckForNull: CheckForNull is now supported by NullAway as well.

[codecov]

Codecov Report

Merging #15 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master      #15   +/-   ##
=========================================
  Coverage     83.33%   83.33%           
  Complexity       49       49           
=========================================
  Files            10       10           
  Lines           210      210           
  Branches          6        6           
=========================================
  Hits            175      175           
  Misses           35       35           

Impacted Files	Coverage Δ	Complexity Δ
...ins/plugins/checks/BuildStatusChecksPublisher.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...va/io/jenkins/plugins/checks/api/ChecksAction.java	100.00% <100.00%> (ø)	5.00 <1.00> (ø)
...ava/io/jenkins/plugins/checks/api/ChecksImage.java	100.00% <100.00%> (ø)	5.00 <1.00> (ø)

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