[test] Add make test-spec-watch.

Author: lgarron

Makefile

@@ -2,7 +2,7 @@
 # https://github.com/lgarron/Makefile-scripts
 
 # Note: the first command becomes the default `make` target.
-NPM_COMMANDS = build build-esm build-bundle-global build-types build-bin build-sites build-site-twizzle build-site-experiments build-site-typedoc build-search-worker generate-js generate-js-parsers generate-js-svg dev link clean test test-dist-esm-node-import test-dist-esm-scramble-all-events test-dist-esm-parcel test-dist-esm-vite test-dist-esm-perf test-dist-esm-plain-esbuild-compat test-dist-experiments test-dist-not-imported-from-src test-import-restrictions test-spec test-tsc format setup initial-setup lint prepack postpublish
+NPM_COMMANDS = build build-esm build-bundle-global build-types build-bin build-sites build-site-twizzle build-site-experiments build-site-typedoc build-search-worker generate-js generate-js-parsers generate-js-svg dev link clean test test-dist-esm-node-import test-dist-esm-scramble-all-events test-dist-esm-parcel test-dist-esm-vite test-dist-esm-perf test-dist-esm-plain-esbuild-compat test-dist-experiments test-dist-not-imported-from-src test-import-restrictions test-spec test-spec-watch test-tsc format setup initial-setup lint prepack postpublish
 
 .PHONY: $(NPM_COMMANDS)
 $(NPM_COMMANDS):

package.json

@@ -132,6 +132,7 @@
     "test-dist-not-imported-from-src": "node ./script/test/dist/not-imported-from-src/main.js",
     "test-import-restrictions": "node ./script/test/import-restrictions/main.js",
     "test-spec": "npx web-test-runner",
+    "test-spec-watch": "npx web-test-runner --watch",
     "test-tsc": "npm run build-types && npx tsc --project ./tsconfig.json",
     "format": "npx eslint --fix --ext=js,ts src script; npx prettier --write src script",
     "setup": "npm install",