build: update some types to be compatible with Node v14

dgp1130 · alan-agius4 · commit eeccbcd82bc1 · 2021-10-29T13:00:03.000+02:00
See http://cl/406111801 with the google3 version of this change.
diff --git a/packages/angular_devkit/schematics/src/utility/update-buffer.ts b/packages/angular_devkit/schematics/src/utility/update-buffer.ts
@@ -52,7 +52,7 @@ 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) : '') +
@@ -279,7 +279,7 @@ export class UpdateBuffer extends UpdateBufferBase {
     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
`@@ -52,7 +52,7 @@ export class Chunk {`
`52`	`52`	`(this._right ? this._right.length : 0)`
`53`	`53`	`);`
`54`	`54`	`}`
`55`		`- toString(encoding = 'utf-8') {`
	`55`	`+ toString(encoding: BufferEncoding = 'utf-8') {`
`56`	`56`	`return (`
`57`	`57`	`(this._left ? this._left.toString(encoding) : '') +`
`58`	`58`	`(this._content ? this._content.toString(encoding) : '') +`
`@@ -279,7 +279,7 @@ export class UpdateBuffer extends UpdateBufferBase {`
`279`	`279`	`return this._originalContent;`
`280`	`280`	`}`
`281`	`281`
`282`		`- toString(encoding = 'utf-8'): string {`
	`282`	`+ toString(encoding: BufferEncoding = 'utf-8'): string {`
`283`	`283`	`return this._linkedList.reduce((acc, chunk) => acc + chunk.toString(encoding), '');`
`284`	`284`	`}`
`285`	`285`	`generate(): Buffer {`