Allow to merge no coverages reports

[k1LoW]

No description provided.

[github-actions]

Code Metrics Report

	main (0e54fd6)	#274 (c718bed)	+/-
Coverage	66.5%	66.5%	-0.0%
Code to Test Ratio	1:0.5	1:0.5	+0.0
Test Execution Time	21s	1m36s	+1m15s

Details

  |                     | main (0e54fd6) | #274 (c718bed) |  +/-   |
  |---------------------|----------------|----------------|--------|
- | Coverage            |          66.5% |          66.5% |  -0.0% |
  |   Files             |             31 |             31 |      0 |
  |   Lines             |           2799 |           2788 |    -11 |
- |   Covered           |           1862 |           1854 |     -8 |
+ | Code to Test Ratio  |          1:0.5 |          1:0.5 |   +0.0 |
  |   Code              |           7214 |           7192 |    -22 |
+ |   Test              |           3512 |           3628 |   +116 |
- | Test Execution Time |            21s |          1m36s | +1m15s |

Code coverage of files in pull request scope (90.6% → 95.2%)

Files	Coverage	+/-
pkg/coverage/merge.go	95.2%	+4.6%

Benchmark-0 (this is custom metrics test)

	main (0e54fd6)	#274 (c718bed)	+/-
Number of iterations	1000	1000	0
Nanoseconds per iteration	676.5 ns/op	676.5 ns/op	0.0 ns/op

Metadata

	main (0e54fd6)	#274 (c718bed)
goos	darwin	darwin
goarch	amd64	amd64

Benchmark-1 (this is custom metrics test)

	main (0e54fd6)	#274 (c718bed)	+/-
Number of iterations	1500	1500	0
Nanoseconds per iteration	1345 ns/op	1345 ns/op	0 ns/op

Metadata

	main (0e54fd6)	#274 (c718bed)
goos	darwin	darwin
goarch	amd64	amd64

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Reported by octocov