change tsconfig target to esnext

Author: huozhi

packages/next/tsconfig.json

@@ -2,7 +2,7 @@
   "compilerOptions": {
     "strict": true,
     "module": "esnext",
-    "target": "ES2017",
+    "target": "esnext",
     "esModuleInterop": true,
     "moduleResolution": "node",
     "jsx": "react"

test/integration/build-output/test/index.test.js

@@ -123,16 +123,16 @@ describe('Build Output', () => {
           )
           expect(indexSize.endsWith(' B')).toBe(true)
 
-          expect(parseFloat(indexFirstLoad)).toBeCloseTo(gz ? 66.4 : 205, 1)
+          expect(parseFloat(indexFirstLoad)).toBeCloseTo(gz ? 64 : 197, 1)
           expect(indexFirstLoad.endsWith('kB')).toBe(true)
 
-          expect(parseFloat(err404Size)).toBeCloseTo(gz ? 195 : 267, 1)
-          expect(err404Size.endsWith(' B')).toBe(true)
+          expect(parseFloat(err404Size)).toBeCloseTo(gz ? 3.17 : 8.49, 1)
+          expect(err404Size.endsWith('kB')).toBe(true)
 
-          expect(parseFloat(err404FirstLoad)).toBeCloseTo(gz ? 66.3 : 205, 1)
+          expect(parseFloat(err404FirstLoad)).toBeCloseTo(gz ? 66.9 : 205, 1)
           expect(err404FirstLoad.endsWith('kB')).toBe(true)
 
-          expect(parseFloat(sharedByAll)).toBeCloseTo(gz ? 66.1 : 205, 1)
+          expect(parseFloat(sharedByAll)).toBeCloseTo(gz ? 63.8 : 196, 1)
           expect(sharedByAll.endsWith('kB')).toBe(true)
 
           const appSizeValue = _appSize.endsWith('kB')
@@ -149,7 +149,7 @@ describe('Build Output', () => {
             true
           )
 
-          expect(parseFloat(mainSize)).toBeCloseTo(gz ? 22.5 : 71.2, 1)
+          expect(parseFloat(mainSize)).toBeCloseTo(gz ? 20.2 : 62.9, 1)
           expect(mainSize.endsWith('kB')).toBe(true)
 
           expect(parseFloat(frameworkSize)).toBeCloseTo(gz ? 42.0 : 130, 1)

test/integration/fallback-modules/test/index.test.js

@@ -49,7 +49,7 @@ describe('Build Output', () => {
       expect(indexSize.endsWith('kB')).toBe(true)
 
       expect(parseFloat(indexFirstLoad)).toBeLessThanOrEqual(
-        process.env.NEXT_PRIVATE_TEST_WEBPACK4_MODE ? 70.5 : 68.9
+        process.env.NEXT_PRIVATE_TEST_WEBPACK4_MODE ? 68 : 67.9
       )
       expect(parseFloat(indexFirstLoad)).toBeGreaterThanOrEqual(60)
       expect(indexFirstLoad.endsWith('kB')).toBe(true)

test/integration/size-limit/test/index.test.js

@@ -85,6 +85,6 @@ describe('Production response size', () => {
     const delta = responseSizesBytes / 1024
 
     // Expected difference: < 0.5
-    expect(delta).toBeCloseTo(294.6, 0)
+    expect(delta).toBeCloseTo(286.8, 0)
   })
 })