fix(key-card): add .npmignore to fix npm export

In the absence of an .npmignore file, npm uses .gitignore
to determine which files to not publish -- as a result the
built distribution was not exported.

Ticket: CE-1215

modules/key-card/.npmignore

@@ -0,0 +1,13 @@
+!dist/
+dist/test/
+dist/tsconfig.tsbuildinfo
+.idea/
+tsconfig.json
+src/
+test/
+.nyc_output
+CODEOWNERS
+CHANGELOG.md
+README.md
+node_modules/
+.mocharc.js