fix: ignore codecov.io reporting failure

[hyj1991]

Ref: codecov/codecov-node#284

[codecov]

Codecov Report

Merging #96 (c258720) into master (b7e23e1) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            master       #96    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            8         8            
  Lines          456       287   -169     
==========================================
- Hits           456       287   -169     

Impacted Files	Coverage Δ
lib/xctl.js	100.00% <0.00%> (ø)
lib/clean.js	100.00% <0.00%> (ø)
lib/utils.js	100.00% <0.00%> (ø)
patch/http.js	100.00% <0.00%> (ø)
patch/index.js	100.00% <0.00%> (ø)
lib/configure.js	100.00% <0.00%> (ø)
patch/shimmer.js	100.00% <0.00%> (ø)

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