chore(peerDependencies): narrow angular peerDependencies to exclude v…

…ersions with JSONP bug#13219

- add note in `README.md` regarding angular version and  angular/angular#13219

README.md

@@ -22,6 +22,16 @@ Install it with npm
 
 `npm install ng2-sharebuttons --save`
 
+> **Note**: Make sure you are using a version of `@angular` in the following ranges: 
+> * `>=2.0.0  and <2.4.6` or 
+> * `>=2.4.8 and <4.0.0-beta.6` or
+> * `>=4.0.0-beta.8`
+>
+> In fact, a bug(#13219) in `@angular/http`(JSONP) was introduced in [`2.4.6`](https://github.com/angular/angular/commit/1eece50)(resp. [`4.0.0-beta.6`](https://github.com/angular/angular/commit/9e5617e)) and fixed in [`2.4.8`](https://github.com/angular/angular/commit/9ceb5d1)(resp. [`4.0.0-beta.8`](https://github.com/angular/angular/commit/4676df5)).
+> It affects JSONP and the count of number of shares for some buttons (linkedin and tumblr).
+>
+> See angular's [CHANGELOG](https://github.com/angular/angular/blob/master/CHANGELOG.md) for details.
+
 ### SystemJS
 If you are using SystemJS, you should also adjust your configuration to point to the UMD bundle.
 

gulpfile.js

@@ -201,7 +201,16 @@ gulp.task('package', (cb) => {
     // defines project's dependencies as 'peerDependencies' for final users
     targetPkgJson.peerDependencies = {};
     Object.keys(pkgJson.dependencies).forEach((dependency) => {
-        targetPkgJson.peerDependencies[dependency] = `^${pkgJson.dependencies[dependency]}`;
+        if (dependency.startsWith('@angular/')) {
+            // narrow version of @angular packages to address bug with JSONP inroduced in [2.4.6, 2.4.8[ && [4.0.0-beta.6, 4.0.0-beta.8[
+            // see https://github.com/angular/angular/pull/13219 and changelog
+            targetPkgJson.peerDependencies[dependency] = `>=2.0.0 <2.4.6 || >=2.4.8 <4.0.0-beta.6 || >=4.0.0-beta.8`;
+        }
+        else {
+            targetPkgJson.peerDependencies[dependency] = `^${pkgJson.dependencies[dependency]}`;
+
+        }
+
     });
 
     // copy the needed additional files in the 'dist' folder