'Tekton: Follow Log' command for PipelineRuns and TaskRuns

[sudhirverma]

Fix: #93

[codecov-io]

Codecov Report

Merging #99 into master will increase coverage by 0.27%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #99      +/-   ##
==========================================
+ Coverage   72.29%   72.57%   +0.27%     
==========================================
  Files          19       19              
  Lines         989      999      +10     
  Branches      148      148              
==========================================
+ Hits          715      725      +10     
  Misses        274      274

Impacted Files	Coverage Δ
src/extension.ts	86.25% <100%> (+0.35%)	⬆️
src/tekton/pipelinerun.ts	100% <100%> (ø)	⬆️
src/tkn.ts	78.22% <100%> (+0.25%)	⬆️
src/tekton/taskrun.ts	100% <100%> (ø)	⬆️

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[dgolovin]

Please rename static methods 'followLog' to 'followLogs', method name should be the same as last segment of command identifier. This is required for tests to be able to find method corresponding to command.