fix: only throw errors for major version changes (#425)

Update existing error handling logic to only throw errors when the major version number
is different between the parent and child windows.

This assumes that minor and patch releases make no breaking changes to post message communication.

src/child/child.js

@@ -74,6 +74,22 @@ function destroy(): ZalgoPromise<void> {
   });
 }
 
+// Compares the first numerical value of the parent and child versions of zoid,
+// ensuring that an error is only thrown when major versions of Zoid do not match.
+// Additionally, zoid version strings should be in snake_case format (10_1_0, 10_2_0, 11_0_0, etc.)
+function versionCompatabilityCheck(
+  version1: string,
+  version2: string
+): boolean {
+  if (!/_/.test(version1) || !/_/.test(version2)) {
+    throw new Error(
+      `Versions are in an invalid format (${version1}, ${version2})`
+    );
+  }
+
+  return version1.split("_")[0] === version2.split("_")[0];
+}
+
 export type ChildComponent<P, X> = {|
   getProps: () => ChildPropsType<P, X>,
   init: () => ZalgoPromise<void>,
@@ -100,7 +116,7 @@ export function childComponent<P, X, C>(
     props: initialProps,
   } = payload;
 
-  if (version !== __ZOID__.__VERSION__) {
+  if (!versionCompatabilityCheck(version, __ZOID__.__VERSION__)) {
     throw new Error(
       `Parent window has zoid version ${version}, child window has version ${__ZOID__.__VERSION__}`
     );