Add .shellcheckrc, move phpstan tmp folder to repository temp folder

.shellcheckrc

@@ -0,0 +1,2 @@
+shell=bash
+external-sources=true

4dev/checking/phpunit.sh

@@ -12,7 +12,7 @@ if [ "${1}" = "t" ] || [ "${2}" = "t" ]; then
 	opt_testdox="--testdox";
 fi;
 php_bin="";
-if [ ! -z "${1}" ]; then
+if [ -n "${1}" ]; then
 	case "${1}" in
 		# "7.3") php_bin="/usr/bin/php7.3 "; ;;
 		# "7.4") php_bin="/usr/bin/php7.4 "; ;;
@@ -23,7 +23,7 @@ if [ ! -z "${1}" ]; then
 		*) echo "Not support PHP: ${1}"; exit; ;;
 	esac;
 fi;
-if [ ! -z "${2}" ] && [ -z "${php_bin}" ]; then
+if [ -n "${2}" ] && [ -z "${php_bin}" ]; then
 	case "${2}" in
 		# "7.3") php_bin="/usr/bin/php7.3 "; ;;
 		# "7.4") php_bin="/usr/bin/php7.4 "; ;;

phpstan.neon

@@ -2,7 +2,7 @@
 includes:
 	- phpstan-conditional.php
 parameters:
-	tmpDir: /tmp/phpstan-corelibs
+	tmpDir: %currentWorkingDirectory%/tmp/phpstan-corelibs
 	level: 8 # max is now 9
 	checkMissingCallableSignature: true
 	treatPhpDocTypesAsCertain: false

tmp/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore