Merge branch 'master' into release-3.9

Author: DanielRosenwasser

.github/ISSUE_TEMPLATE/config.yml

@@ -14,6 +14,6 @@ contact_links:
     name: "TypeScript FAQ"
     url: "https://github.com/microsoft/TypeScript/wiki/FAQ"
   - 
-    about: "Please raise issues about the site on it's own repo."
+    about: "Please raise issues about the site on its own repo."
     name: Website
     url: "https://github.com/microsoft/TypeScript-Website/issues/new"

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x, 10.x, 12.x]
+        node-version: [10.x, 12.x, 13.x]
 
     steps:
     - uses: actions/checkout@v1
@@ -35,6 +35,7 @@ jobs:
         npm install
         npm update
         npm test
+        
     - name: Validate the browser can import TypeScript
       run: gulp test-browser-integration
 

lib/cs/diagnosticMessages.generated.json

@@ -62,15 +62,6 @@ interface Array<T> {
      * @param end If not specified, length of the this object is used as its default value.
      */
     copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-     * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-     * @param start The zero-based location in the array from which to start removing elements.
-     * @param deleteCount The number of elements to remove. If deleteCount is omitted, or if its value is equal to or larger
-     * than array.length - start (that is, if it is equal to or greater than the number of elements left in the array,
-     * starting at start), then all the elements from start to the end of the array will be deleted.
-     */
-    splice(start: number, deleteCount?: number): T[];
 }
 
 interface ArrayConstructor {
@@ -233,27 +224,27 @@ interface NumberConstructor {
      * number. Only finite values of the type number, result in true.
      * @param number A numeric value.
      */
-    isFinite(number: number): boolean;
+    isFinite(number: unknown): boolean;
 
     /**
      * Returns true if the value passed is an integer, false otherwise.
      * @param number A numeric value.
      */
-    isInteger(number: number): boolean;
+    isInteger(number: unknown): boolean;
 
     /**
      * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
      * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
      * to a number. Only values of the type number, that are also NaN, result in true.
      * @param number A numeric value.
      */
-    isNaN(number: number): boolean;
+    isNaN(number: unknown): boolean;
 
     /**
      * Returns true if the value passed is a safe integer.
      * @param number A numeric value.
      */
-    isSafeInteger(number: number): boolean;
+    isSafeInteger(number: unknown): boolean;
 
     /**
      * The value of the largest integer n such that n and n + 1 are both exactly representable as