Exclude __tests__ from published files (react-navigation#1525)

Author: migueloller

.npmignore

@@ -1 +1,2 @@
-examples
+examples
+__tests__

package.json

@@ -20,8 +20,8 @@
     "build": "npm run build-docs && npm run build-web && npm run build-rn && npm run build-dot-flow",
     "watch-rn": "mkdir -p lib-rn/views/ && cp -R src/views/assets lib/views/assets && BABEL_ENV=publish-rn babel -w src -d lib-rn",
     "watch-web": "mkdir -p lib/views/ &&  cp -R src/views/assets lib/views/assets && BABEL_ENV=publish-web babel -w src -d lib",
-    "build-rn": "mkdir -p lib-rn/views/ && cp -R src/views/assets lib-rn/views/assets && BABEL_ENV=publish-rn babel src -d lib-rn",
-    "build-web": "mkdir -p lib/views/ && cp -R src/views/assets lib/views/assets && BABEL_ENV=publish-web babel src -d lib",
+    "build-rn": "mkdir -p lib-rn/views/ && cp -R src/views/assets lib-rn/views/assets && BABEL_ENV=publish-rn babel src -d lib-rn --ignore __tests__",
+    "build-web": "mkdir -p lib/views/ && cp -R src/views/assets lib/views/assets && BABEL_ENV=publish-web babel src -d lib --ignore __tests__",
     "build-dot-flow": "find ./src -name '*.js' -not -path '*/__tests__*' | while read filepath; do cp $filepath `echo $filepath | sed 's/\\/src\\//\\/lib\\//g'`.flow && cp $filepath `echo $filepath | sed 's/\\/src\\//\\/lib-rn\\//g'`.flow; done",
     "build-docs": "node scripts/compile-docs",
     "start": "node ./node_modules/react-native/local-cli/cli.js start --config ./rn-cli.config.js",