Add support for base R pipe

[lorenzwalthert]

Closes #800.

[codecov-commenter]

Codecov Report

Merging #803 (a311626) into master (2985c84) will not change coverage.
The diff coverage is 100.00%.

❗ Current head a311626 differs from pull request most recent head 14aae7d. Consider uploading reports for the commit 14aae7d to get more accurate results

@@           Coverage Diff           @@
##           master     #803   +/-   ##
=======================================
  Coverage   90.46%   90.46%           
=======================================
  Files          47       47           
  Lines        2433     2433           
=======================================
  Hits         2201     2201           
  Misses        232      232           

Impacted Files	Coverage Δ
R/rules-indention.R	100.00% <ø> (ø)
R/token-define.R	66.66% <ø> (ø)
R/relevel.R	46.15% <100.00%> (ø)
R/rules-line-breaks.R	100.00% <100.00%> (ø)
R/rules-tokens.R	100.00% <100.00%> (ø)
R/style-guides.R	99.39% <100.00%> (ø)

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[github-actions]

This is how benchmark results would change (along with a 95% confience interval in relative change) if a311626 is merged into master:

• cache_applying: 0.11s -> 0.11s [-1.79%, +5.87%]
• cache_recording: 1.27s -> 1.28s [-0.41%, +2.09%]
• without_cache: 3.33s -> 3.34s [-0.76%, +1.16%]

Further explanation regarding interpretation and methodology can be found in the documentation.

[github-actions]

This is how benchmark results would change (along with a 95% confience interval in relative change) if a311626 is merged into master:

• cache_applying: 0.09s -> 0.09s [-4.69%, +1.72%]
• cache_recording: 1.14s -> 1.14s [-0.25%, +0.52%]
• without_cache: 3.02s -> 3.02s [-0.78%, +1.16%]

Further explanation regarding interpretation and methodology can be found in the documentation.