Merge pull request #22 from a-pavlenko/fix/publish-files-ignore

bugfix: exclude unnecessary files from publish

.npmignore

+# source
+**/*.ts
+*.ts
+
+# definitions
+!**/*.d.ts
+!*.d.ts
+
+# configuration
+.prettierrc
+nest-cli.json
+nodemon-debug.json
+package-lock.json
+tsconfig.json
+tsconfig.spec.json
+tslint.json
+webpack.config.js
+yarn.lock
\ No newline at end of file