FIX: Try to add simple code coverage

Makefile

@@ -12,13 +12,13 @@ clean:
 	cargo clean
 	rm -r -f base/target
 	rm -r -f xlsx/target
-	rm cargo-test-*
+	rm -f cargo-test-*
-	rm base/cargo-test-*
+	rm -f base/cargo-test-*
-	rm xlsx/cargo-test-*
+	rm -f xlsx/cargo-test-*
 
 
 coverage:
-	CARGO_INCREMENTAL=0 RUSTFLAGS='-Cinstrument-coverage' LLVM_PROFILE_FILE='cargo-test-%p-%m.profraw' cargo test
+	CARGO_INCREMENTAL=0 RUSTFLAGS='-C instrument-coverage' LLVM_PROFILE_FILE='cargo-test-%p-%m.profraw' cargo test
 	grcov . --binary-path ./target/debug/deps/ -s . -t html --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/html
 
 docs:

README.md

@@ -1,5 +1,13 @@
 # 📚 IronCalc
 
+[![MIT licensed][mit-badge]][mit-url]
+[![Build Status][actions-badge]][actions-url]
+
+[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[mit-url]: https://github.com/ironcalc/ironcalc/blob/master/LICENSE
+[actions-badge]: https://github.com/ironcalc/ironcalc/actions/workflows/rust-build-test.yaml/badge.svg
+[actions-url]: https://github.com/ironcalc/ironcalc/actions?query=workflow%3ACI+branch%3Amaster
+
 IronCalc is a new, modern, work-in-progress spreadsheet engine and set of tools to work with spreadsheets in diverse settings.
 
 This repository contains the main engine and the xlsx reader and writer.

base/README.md

@@ -1,5 +1,14 @@
 # IronCalc Base
 
+[![Crates.io][crates-badge]][crates-url]
+[![MIT licensed][mit-badge]][mit-url]
+
+[crates-badge]: https://img.shields.io/crates/v/ironcalc_base.svg
+[crates-url]: https://crates.io/crates/ironcalc_base
+[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[mit-url]: https://github.com/ironcalc/ironcalc/blob/master/LICENSE
+
+
 ## About
 
 IronCalc Base is the engine of the IronCalc ecosystem