chore(package): Upgrade to TS 3.0.

And support a TS 3.0 peer.

Author: cartant

package.json

@@ -21,7 +21,7 @@
     "tape": "^4.7.0",
     "ts-node": "^7.0.0",
     "tslint": "^5.5.0",
-    "typescript": "~2.9.1"
+    "typescript": "~3.0.1"
   },
   "es2015": "./dist/esm2015/index.js",
   "homepage": "https://github.com/cartant/ts-snippet",
@@ -37,7 +37,7 @@
   "name": "ts-snippet",
   "optionalDependencies": {},
   "peerDependencies": {
-    "typescript": "^2.1.0"
+    "typescript": "^2.1.0 || ^3.0.0"
   },
   "private": true,
   "repository": {

source/compiler.ts

@@ -76,7 +76,11 @@ export class Compiler {
             this._files[fileName].content = files[fileName];
             this._files[fileName].version++;
         });
-        return this._languageService.getProgram();
+        const program = this._languageService.getProgram();
+        if (!program) {
+            throw new Error("No program.");
+        }
+        return program;
     }
 
     formatDiagnostic(diagnostic: ts.Diagnostic): string {

yarn.lock

@@ -3392,9 +3392,9 @@ type-detect@^4.0.0:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
 
-typescript@~2.9.1:
-  version "2.9.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+typescript@~3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.1.tgz#43738f29585d3a87575520a4b93ab6026ef11fdb"
 
 uid2@0.0.3:
   version "0.0.3"