Add conflibot workflow

[nowsprinting]

Changes

• Add conflibot workflow
• Fix permissions and enable bash pipefail option

[github-actions]

Code Metrics Report

	master (90d1636)	#31 (f54ed97)	+/-
Coverage	37.0%	37.0%	0.0%
Code to Test Ratio	1:3.2	1:3.2	0.0
Test Execution Time	4m47s	6m24s	+1m37s

Details

  |                     | master (90d1636) | #31 (f54ed97) |  +/-   |
  |---------------------|------------------|---------------|--------|
  | Coverage            |            37.0% |         37.0% |   0.0% |
  |   Files             |               30 |            30 |      0 |
  |   Lines             |              507 |           507 |      0 |
  |   Covered           |              188 |           188 |      0 |
  | Code to Test Ratio  |            1:3.2 |         1:3.2 |    0.0 |
  |   Code              |             1381 |          1381 |      0 |
  |   Test              |             4482 |          4482 |      0 |
- | Test Execution Time |            4m47s |         6m24s | +1m37s |

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Reported by octocov