Prevent unhandled rejection for promise returned from mutate function

[jerelmiller]

Fixes #12888

[changeset-bot]

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Latest commit: 9b46007

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[pkg-pr-new]

npm i https://pkg.pr.new/apollographql/apollo-client/@apollo/client@12892

commit: da7f12a

[github-actions]

size-limit report 📦

Path	Size
import { ApolloClient, InMemoryCache, HttpLink } from "@apollo/client" (CJS)	42.78 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "@apollo/client" (production) (CJS)	37.8 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "@apollo/client"	32.79 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "@apollo/client" (production)	27 KB (0%)
import { ApolloProvider } from "@apollo/client/react"	5.9 KB (0%)
import { ApolloProvider } from "@apollo/client/react" (production)	961 B (0%)
import { useQuery } from "@apollo/client/react"	7.21 KB (0%)
import { useQuery } from "@apollo/client/react" (production)	2.22 KB (0%)
import { useLazyQuery } from "@apollo/client/react"	7.09 KB (0%)
import { useLazyQuery } from "@apollo/client/react" (production)	2.13 KB (0%)
import { useMutation } from "@apollo/client/react"	6.46 KB (+0.08% 🔺)
import { useMutation } from "@apollo/client/react" (production)	1.49 KB (+0.93% 🔺)
import { useSubscription } from "@apollo/client/react"	6.78 KB (0%)
import { useSubscription } from "@apollo/client/react" (production)	1.79 KB (0%)
import { useSuspenseQuery } from "@apollo/client/react"	8.55 KB (0%)
import { useSuspenseQuery } from "@apollo/client/react" (production)	3.61 KB (0%)
import { useBackgroundQuery } from "@apollo/client/react"	8.31 KB (0%)
import { useBackgroundQuery } from "@apollo/client/react" (production)	3.38 KB (0%)
import { useLoadableQuery } from "@apollo/client/react"	8.29 KB (0%)
import { useLoadableQuery } from "@apollo/client/react" (production)	3.37 KB (0%)
import { useReadQuery } from "@apollo/client/react"	6.59 KB (0%)
import { useReadQuery } from "@apollo/client/react" (production)	1.62 KB (0%)
import { useFragment } from "@apollo/client/react"	6.66 KB (0%)
import { useFragment } from "@apollo/client/react" (production)	1.68 KB (0%)

[apollo-librarian]

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Build ID: 907cfd7ec5c32b34b0ff435c
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