fix(deps): golang.org/x/crypto, golang.org/x/text

[gnanderson]

• x/crypto - CVE-2020-9283, improper signature verification
• x/crypto - CVE-2020-29652, nil pointer dereference
• x/text - out of bounds read in <= v0.3.6

[CLAassistant]

All committers have signed the CLA.

[MichaelMcAleer]

Please consider upgrading x/text to 0.3.8 or newer to resolve https://github.com/spf13/afero/issues/381

[adrianosela]

Hey folks, can we get these in? 🙏

[vjanelle]

@bep any chance these could be addressed?

[bep]

Will handle this in https://github.com/spf13/afero/pull/386