update typescript to latest version

Author: ajafff

.wotanrc.yaml

@@ -3,3 +3,5 @@ extends:
   - ./rules
 rules:
   tcc/no-unused: error
+  no-useless-assertion: off
+  no-useless-predicate: off

package.json

@@ -47,7 +47,7 @@
     "nyc": "^12.0.1",
     "rimraf": "^2.6.2",
     "tslint": "^5.8.0",
-    "typescript": "2.9.1"
+    "typescript": "3.1.3"
   },
   "peerDependencies": {
     "tslint": "^5.0.0",

rules/noUnnecessaryTypeAnnotationRule.ts

@@ -313,15 +313,15 @@ function removeSignatureReturn(str: string): string {
     return sourceFile.text.substring(7, signature.parameters.end + 1);
 }
 
-function getSignaturesOfType(type: ts.Type): ts.Signature[] {
+function getSignaturesOfType(type: ts.Type): ReadonlyArray<ts.Signature> {
     if (isUnionType(type)) {
         const signatures = [];
         for (const t of type.types)
             signatures.push(...getSignaturesOfType(t));
         return signatures;
     }
     if (isIntersectionType(type)) {
-        let signatures: ts.Signature[] | undefined;
+        let signatures;
         for (const t of type.types) {
             const sig = getSignaturesOfType(t);
             if (sig.length !== 0) {

yarn.lock

@@ -2628,10 +2628,10 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
   integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
 
-typescript@2.9.1:
-  version "2.9.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.1.tgz#fdb19d2c67a15d11995fd15640e373e09ab09961"
-  integrity sha512-h6pM2f/GDchCFlldnriOhs1QHuwbnmj6/v7499eMHqPeW4V2G0elua2eIc2nu8v2NdHV0Gm+tzX83Hr6nUFjQA==
+typescript@3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.3.tgz#01b70247a6d3c2467f70c45795ef5ea18ce191d5"
+  integrity sha512-+81MUSyX+BaSo+u2RbozuQk/UWx6hfG0a5gHu4ANEM4sU96XbuIyAB+rWBW1u70c6a5QuZfuYICn3s2UjuHUpA==
 
 uglify-js@^2.6:
   version "2.8.29"