feat(ci): upgrade Node.js version from 16 to 20

Updates all GitHub workflow jobs to use Node.js 20 for CI tasks.

Issue: BTC-2285

Author: davidkaplanbitgo

.github/workflows/main_ci.yml

@@ -65,7 +65,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -76,7 +76,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -87,7 +87,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -98,7 +98,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -109,7 +109,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -120,7 +120,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
       - run: npm ci
@@ -142,7 +142,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
       - run: npm ci
       - run: ./node_modules/.bin/semantic-release