fix: require guzzle psr7 v1.x

[atymic]

Fixes #370

For the moment until the oauth dep is updated.

[codecov]

Codecov Report

Merging #370 (095af83) into main (73fc2bc) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #370   +/-   ##
=========================================
  Coverage     37.45%   37.45%           
  Complexity      367      367           
=========================================
  Files            33       33           
  Lines           841      841           
=========================================
  Hits            315      315           
  Misses          526      526           

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