Bump the gargle version

Author: jennybc

DESCRIPTION

@@ -17,13 +17,13 @@ License: MIT + file LICENSE
 URL: https://googlesheets4.tidyverse.org,
     https://github.com/tidyverse/googlesheets4
 BugReports: https://github.com/tidyverse/googlesheets4/issues
-Depends: 
+Depends:
     R (>= 3.6)
-Imports: 
+Imports:
     cellranger,
     cli (>= 3.0.0),
     curl,
-    gargle (>= 1.5.0),
+    gargle (>= 1.6.0),
     glue (>= 1.3.0),
     googledrive (>= 2.1.0),
     httr,
@@ -38,7 +38,7 @@ Imports:
     utils,
     vctrs (>= 0.2.3),
     withr
-Suggests: 
+Suggests:
     readr,
     rmarkdown,
     spelling,