[chg] rewrite current line with timestamp prefix after newline

timestamp marks the time when the line was "sent" or "committed"

Cargo.toml

@@ -2,13 +2,13 @@
 name = "logtimes"
 version = "0.1.0"
 authors = ["Paul Schulze <p.schulze@avm.de>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+edition = "2021"
 
 [dependencies]
 chrono = "0.4"
 
 [profile.release]
-debug = false
 lto = true
+codegen-units = 1
+debug = false
+panic = "unwind"