Bump cni version to 0.3.1

[l1b0k]

fix #190

[codecov-commenter]

Codecov Report

Merging #242 (3a0d6de) into main (893821f) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main    #242   +/-   ##
=====================================
  Coverage   6.00%   6.00%           
=====================================
  Files         52      52           
  Lines       7130    7130           
=====================================
  Hits         428     428           
  Misses      6673    6673           
  Partials      29      29           

Flag	Coverage Δ
unittests	6.00% <ø> (ø)

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Impacted Files	Coverage Δ
plugin/terway/cni.go	0.18% <ø> (ø)
plugin/version/spec.go	0.00% <ø> (ø)

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[BSWANG]

确认下0.3.1支持的k8s版本

[l1b0k]

确认下0.3.1支持的k8s版本

1.9 就支持 0.3.1
https://github.com/kubernetes/kubernetes/blob/7cdbb6ae8f42e56f49d9ddd64e9e70869df3121f/vendor/github.com/containernetworking/cni/pkg/types/current/types.go#L27