add isStringNumeric to library #24

	name: tests
	on:
	pull_request: {}
	push:
	branches:
	- main
	- master

	jobs:
	test:
	name: test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	- name: make test
	run: \|
	go install github.com/google/go-jsonnet/cmd/jsonnet@latest
	go install github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@latest
	make test
	docs:
	name: docs
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	- name: make docs
	run: \|
	go install github.com/jsonnet-libs/docsonnet@master
	make docs
	git diff --exit-code

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