Merge pull request #458 from renkun-ken/require-styler-1.5.1

Require styler >= 1.5.1

Author: renkun-ken

DESCRIPTION

@@ -32,7 +32,7 @@ Imports:
     repr (>= 1.1.0),
     roxygen2 (>= 7.0.0),
     stringi (>= 1.1.7),
-    styler (>= 1.4.1),
+    styler (>= 1.5.1),
     tools,
     utils,
     xml2 (>= 1.2.2),

README.md

@@ -189,10 +189,3 @@ options(languageserver.formatting_style = function(options) {
 ```
 
 To further customize the formatting style, please refer to [Customizing styler](https://styler.r-lib.org/articles/customizing_styler.html).
-
-### Using persistent cache for formatting by styler
-
-With [`styler`](https://github.com/r-lib/styler) v1.3, the formatting of top-level expressions
-can be cached by [`R.cache`](https://github.com/HenrikBengtsson/R.cache), which significantly improves the formatting performance by skipping the expressions that are known in cache to be already formatted. By default, the cache only works within the current session.
-
-To make it work across sessions, set the R option `R.cache.rootPath` or environment variable `R_CACHE_ROOTPATH` to an existent path. For more details, see [styler caching](https://styler.r-lib.org/reference/caching.html).