Ignore test files from the npm package

[tkrotoff]

.npmignore with:

dist/cjs/Http.test.js
dist/Http.test.d.ts
dist/Http.test.js

does not work :/

npm publish --dry-run output:

=== Tarball Contents === 
npm notice 1.8kB  package.json          
npm notice 577B   CHANGELOG.md          
npm notice 1.1kB  LICENSE               
npm notice 619B   README.md             
npm notice 3.9kB  dist/cjs/Http.js      
npm notice 10.8kB dist/cjs/Http.test.js 
npm notice 467B   dist/cjs/HttpError.js 
npm notice 1.6kB  dist/cjs/HttpStatus.js
npm notice 272B   dist/cjs/index.js     
npm notice 686B   dist/Http.d.ts        
npm notice 3.6kB  dist/Http.js          
npm notice 11B    dist/Http.test.d.ts   
npm notice 9.9kB  dist/Http.test.js     
npm notice 126B   dist/HttpError.d.ts   
npm notice 366B   dist/HttpError.js     
npm notice 635B   dist/HttpStatus.d.ts  
npm notice 1.5kB  dist/HttpStatus.js    
npm notice 83B    dist/index.d.ts       
npm notice 83B    dist/index.js 

[tkrotoff]

see c730ea