Update dependency babel-plugin-istanbul to ^5.1.0

5 jobs for renovate/babel-plugin-istanbul-5.x in 2 minutes and 32 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
canceled test_node4 #251783

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canceled test_node5 #251784

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canceled test_node6 #251785

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canceled test_node7 #251786

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canceled test_node8 #251787

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