go.mod: update imports to current versions

[TheNagaPraneeth]

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Patch Set 1:

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This PR (HEAD: 5b945fb) has been imported to Gerrit for code review.

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This PR (HEAD: 4d61c13) has been imported to Gerrit for code review.

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Message from Ian Lance Taylor:

Patch Set 3: Run-TryBot+1

(2 comments)

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Patch Set 3:

(1 comment)

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Message from Gopher Robot:

Patch Set 3: TryBot-Result+1

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Message from Ian Lance Taylor:

Patch Set 4:

(2 comments)

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This PR (HEAD: 9d13996) has been imported to Gerrit for code review.

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Message from Naga Praneeth Dunnala:

Patch Set 6:

(3 comments)

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Message from Ian Lance Taylor:

Patch Set 6: Code-Review+2

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Message from Naga Praneeth Dunnala:

Patch Set 6:

(1 comment)

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Message from Naga Praneeth Dunnala:

Patch Set 6:

(1 comment)

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Message from Damien Neil:

Patch Set 6: Code-Review+2

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Message from Damien Neil:

Patch Set 6: Run-TryBot+1

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Message from Damien Neil:

Patch Set 7: Patch Set 6 was rebased

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Message from Gopher Robot:

Patch Set 6:

(1 comment)

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Message from Damien Neil:

Patch Set 7: Run-TryBot+1 Code-Review+2

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Message from Gopher Robot:

Patch Set 7:

(2 comments)

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Message from Gopher Robot:

Patch Set 7: TryBot-Result+1

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This PR is being closed because golang.org/cl/374374 has been merged.