build(scripts): update scripts to fail if any command fails

scripts/build_package.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
+set -e
 npx tsc -b
 npx babel --config-file=../../../babel.config.js lib --ignore="src/**/__tests__/**" --out-dir dist/esm &
 npx babel --config-file=../../../babel.config.cjs.js lib --ignore="src/**/__tests__/**" --out-dir dist/cjs &
-wait
+wait

scripts/clean_package.sh

@@ -1,2 +1,3 @@
 #!/bin/sh
-rimraf lib dist tsconfig.tsbuildinfo
+set -e
+rimraf lib dist tsconfig.tsbuildinfo

scripts/watch_package.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e
 tsc -w --preserveWatchOutput&
 npx babel --config-file=../../../babel.config.cjs.js lib --out-dir dist/cjs -w --verbose&
-npx babel --config-file=../../../babel.config.js lib --out-dir dist/esm -w --verbose
+npx babel --config-file=../../../babel.config.js lib --out-dir dist/esm -w --verbose