Allow lintr to consider .Renviron settings. Fix #3391 (#3727)

* Fix lintr.vim to consider Renviron

* Update test_lintr.vader to match lintr.vim fix

* Update credits

Co-authored-by: ourigen <ourigen [at] pm.me>

ale_linters/r/lintr.vim

@@ -1,5 +1,6 @@
 " Author: Michel Lang <michellang@gmail.com>, w0rp <devw0rp@gmail.com>,
-"         Fenner Macrae <fmacrae.dev@gmail.com>
+"         Fenner Macrae <fmacrae.dev@gmail.com>,
+"         ourigen <https://github.com/ourigen>
 " Description: This file adds support for checking R code with lintr.
 
 let g:ale_r_lintr_options = get(g:, 'ale_r_lintr_options', 'with_defaults()')
@@ -21,7 +22,7 @@ function! ale_linters#r#lintr#GetCommand(buffer) abort
     let l:cmd_string = 'suppressPackageStartupMessages(library(lintr));'
     \   . l:lint_cmd
 
-    return 'Rscript --vanilla -e ' . ale#Escape(l:cmd_string) . ' %t'
+    return 'Rscript --no-save --no-restore --no-site-file --no-init-file -e ' . ale#Escape(l:cmd_string) . ' %t'
 endfunction
 
 call ale#linter#Define('r', {