build: update some types to be compatible with Node v14

dgp1130 · alan-agius4 · commit 8c59dfc8d9e3 · 2021-10-29T13:00:07.000+02:00
See http://cl/406111801 with the google3 version of this change. (cherry picked from commit eeccbcd)
diff --git a/packages/angular_devkit/schematics/src/utility/update-buffer.ts b/packages/angular_devkit/schematics/src/utility/update-buffer.ts
@@ -48,7 +48,7 @@ export class Chunk {
       (this._right ? this._right.length : 0)
     );
   }
-  toString(encoding = 'utf-8') {
+  toString(encoding: BufferEncoding = 'utf-8') {
     return (
       (this._left ? this._left.toString(encoding) : '') +
       (this._content ? this._content.toString(encoding) : '') +
@@ -234,7 +234,7 @@ export class UpdateBuffer {
     return this._originalContent;
   }
 
-  toString(encoding = 'utf-8'): string {
+  toString(encoding: BufferEncoding = 'utf-8'): string {
     return this._linkedList.reduce((acc, chunk) => acc + chunk.toString(encoding), '');
   }
   generate(): Buffer {

Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ export class Chunk {`
`48`	`48`	`(this._right ? this._right.length : 0)`
`49`	`49`	`);`
`50`	`50`	`}`
`51`		`- toString(encoding = 'utf-8') {`
	`51`	`+ toString(encoding: BufferEncoding = 'utf-8') {`
`52`	`52`	`return (`
`53`	`53`	`(this._left ? this._left.toString(encoding) : '') +`
`54`	`54`	`(this._content ? this._content.toString(encoding) : '') +`
`@@ -234,7 +234,7 @@ export class UpdateBuffer {`
`234`	`234`	`return this._originalContent;`
`235`	`235`	`}`
`236`	`236`
`237`		`- toString(encoding = 'utf-8'): string {`
	`237`	`+ toString(encoding: BufferEncoding = 'utf-8'): string {`
`238`	`238`	`return this._linkedList.reduce((acc, chunk) => acc + chunk.toString(encoding), '');`
`239`	`239`	`}`
`240`	`240`	`generate(): Buffer {`