Force filename when calling yarn pack

Since #60 changed tarball filename to something that slightly differs
from the default once generate by Yarn, we must explicitly force the
filename when creating the archive.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@matt-block/react-native-in-app-browser",
-  "version": "1.4.1-rc.0",
+  "version": "1.4.1",
   "description": "React Native in-app browser",
   "keywords": [
     "in-app",
@@ -76,4 +76,4 @@
   "dependencies": {
     "tinycolor2": "^1.4.1"
   }
-}
+}

scripts/publishCI.ts

@@ -12,12 +12,11 @@ const tag = getPublishingTag(process.env.CIRCLE_BRANCH!);
 
 // Continue with publish process.
 createTarball();
-const tarballName = getTarballName();
 setupNpm();
-publish(tarballName, getCurrentVersion(), tag);
+publish(getTarballName(), getCurrentVersion(), tag);
 
 function createTarball() {
-  sh.exec("yarn pack");
+  sh.exec(`yarn pack --filename ${getTarballName()}`);
 }
 
 function publish(tarball: string, version: string, tag: string) {