Allow parsing .cjs files as javascript (#13)

Author: IanVS

.tape.js

@@ -61,6 +61,14 @@ module.exports = {
 		expect: 'basic.import.expect.css',
 		result: 'basic.import.result.css'
 	},
+	'basic:import-cjs': {
+		message: 'supports { importFrom: "test/import-variables.cjs" } usage',
+		options: {
+			importFrom: 'test/import-variables.cjs'
+		},
+		expect: 'basic.import.expect.css',
+		result: 'basic.import.result.css'
+	},
 	'basic:import-js-from': {
 		message: 'supports { importFrom: { from: "test/import-variables.js" } } usage',
 		options: {

src/lib/import-from.js

@@ -73,7 +73,7 @@ export default function importEnvironmentVariablesFromSources(sources) {
 	}).reduce(async (environmentVariables, source) => {
 		const { type, from } = await source;
 
-		if (type === 'js') {
+		if (type === 'js' || type === 'cjs') {
 			return Object.assign(environmentVariables, await importEnvironmentVariablesFromJSFile(from));
 		}
 

test/import-variables.cjs

@@ -0,0 +1,6 @@
+module.exports = {
+	environmentVariables: {
+		'--some-custom-padding': '20px',
+		'--another-custom-width': '600px'
+	}
+};