[chore] refactor and clean up build system.

* added .version and .branch to .gitignore...

this allow us to to write files once with new version,
and now, the branch which the version will be released.
when it finishes to publish, remove both files.

* execute tests before publish was missing.

* publish assets were not removed.

Author: diasbruno

Diff for: .gitignore

@@ -1,3 +1,5 @@
+.version
+.branch
 examples/**/*-bundle.js
 node_modules/
 .idea/

Diff for: Makefile

@@ -3,9 +3,13 @@ NPM=$(shell which npm)
 YARN=$(shell which yarn)
 JQ=$(shell which jq)
 
+REMOTE="[email protected]:reactjs/react-modal"
+
 VERSION=$(shell jq ".version" package.json)
 
 help: info
+	@echo
+	@echo "Current version: $(VERSION)"
 	@echo
 	@echo "List of commands:"
 	@echo
@@ -24,7 +28,6 @@ info:
 	@echo npm version: `$(NPM) --version` "($(NPM))"
 	@echo yarn version: `$(YARN) --version` "($(YARN))"
 	@echo jq version: `$(JQ) --version` "($(JQ))"
-	@echo react-modal version: $(VERSION)
 
 deps: deps-project deps-docs
 
@@ -59,30 +62,33 @@ build-docs:
 	@rm -rf _book
 	@gitbook build -g reactjs/react-modal
 
-version:
+.version:
 	@echo "[Updating react-modal version]"
 	@sh ./scripts/version $(VERSION)
+	@$(JQ) '.version' package.json | cut -d\" -f2 > .version
+
+.branch:
+	git branch | grep '^*' | awk '{ print $$2 }' > .branch
 
 release-commit:
-	@$(JQ) '.version' package.json | cut -d\" -f2 > .version
 	git commit --allow-empty -m "Release v`cat .version`."
-	@rm .version
 	git add .
 	git commit --amend -m "`git log -1 --format=%s`"
 
 release-tag:
-	@$(JQ) '.version' package.json | cut -d\" -f2 > .version
 	git tag "v`cat .version`"
-	@rm .version
 
 publish-version: release-commit release-tag
 	@echo "[Publishing]"
-	@$(JQ) '.version' package.json | cut -d\" -f2 > .version
-	git push [email protected]:reactjs/react-modal "`git branch | grep '^*' | awk '{ print $$2 }'`" "v`cat .version`"
+	git push $(REMOTE) "`cat .branch`" "v`cat .version`"
 	npm publish
-	@rm .version
 
-publish: version deps-project build publish-version publish-finished
+publish-finished:
+	@rm -rf .version .branch
+
+pre-publish: .branch .version deps-project tests-ci build
+
+publish: pre-publish publish-version publish-finished
 
 publish-docs: deps-docs build-docs
 	@echo "[Publishing docs]"