add make clean

Author: xavpaice

Makefile

@@ -1,11 +1,18 @@
 
 
+.PHONY: clean
+clean:
+	rm -rf dist
+	rm -rf coverage
+	rm -rf examples/*.js
+	find . -name "*.tsbuildinfo" -delete
+
 .PHONY: deps
 deps:
 	npm i
 
 .PHONY: build
-build: deps
+build: clean deps
 	npm run build
 
 .PHONY: test
@@ -15,6 +22,10 @@ test: build
 .PHONY: prettier
 prettier:
 	npm run prettier
+
+.PHONY: prettier-check
+prettier-check:
+	npx prettier --config .prettierrc 'src/**/*.ts' --check
 
 .PHONY: publish
 publish: test