Bump Microsoft.Net.Compilers.Toolset from 3.8.0 to 3.9.0 in /tools/DevicesApiTester (dotnet#1464)

* Bump Microsoft.Net.Compilers.Toolset in /tools/DevicesApiTester

Bumps [Microsoft.Net.Compilers.Toolset](https://github.com/dotnet/roslyn) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/master/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.8.0...v3.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

* Fix buildbreak due to missing casts

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jose Perez Rodriguez <[email protected]>

Author: dependabot[bot]

eng/Compilers.props

@@ -3,7 +3,7 @@
     <!-- This is set to false by default when using the compilers' NuGet package. -->
     <UseSharedCompilation>true</UseSharedCompilation>
 
-    <CompilerVersion>3.8.0</CompilerVersion>
+    <CompilerVersion>3.9.0</CompilerVersion>
   </PropertyGroup>
 
   <PropertyGroup>

src/devices/Arduino/FirmataDevice.cs

@@ -860,7 +860,7 @@ internal void WriteDigitalPin(int pin, PinValue value)
 
             FirmataCommandSequence writeDigitalPin = new FirmataCommandSequence(FirmataCommand.SET_DIGITAL_VALUE);
             writeDigitalPin.WriteByte((byte)pin);
-            writeDigitalPin.WriteByte(value == PinValue.High ? 1 : 0);
+            writeDigitalPin.WriteByte(value == PinValue.High ? (byte)1 : (byte)0);
 
             SendCommand(writeDigitalPin);
         }

src/devices/Card/Mifare/MifareCard.cs

@@ -571,7 +571,7 @@ public bool IsSectorBlock(byte blockNumber)
         /// </summary>
         /// <param name="sectorNumber">Input sector number</param>
         /// <returns>The number of blocks for this specific sector</returns>
-        public byte GetNumberBlocks(byte sectorNumber) => sectorNumber < 32 ? 4 : 16;
+        public byte GetNumberBlocks(byte sectorNumber) => sectorNumber < 32 ? (byte)4 : (byte)16;
 
         /// <summary>
         /// Get the number of blocks for a specific sector
@@ -807,7 +807,7 @@ public bool FormatNdef(ReadOnlySpan<byte> keyB = default)
             authOk &= WriteDataBlock(2);
             authOk &= AuthenticateBlockKeyB(keyFormat, 3);
             Data = new byte[] { 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0x78, 0x77, 088, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-            Data[9] = Capacity == MifareCardCapacity.Mifare1K ? 0xC1 : 0xC2;
+            Data[9] = Capacity == MifareCardCapacity.Mifare1K ? (byte)0xC1 : (byte)0xC2;
             keyFormat.CopyTo(Data, 10);
             authOk &= WriteDataBlock(3);
             authOk &= AuthenticateBlockKeyB(keyFormat, 4);

src/devices/Tsl256x/Tsl256x.cs

@@ -61,7 +61,7 @@ public bool Enabled
         {
             // 0x03 is power on, see doc page 14
             get => (ReadByte(Register.CONTROL) & 0x03) == 0x03;
-            set => WriteByte(Register.CONTROL, value ? 0x03 : 0x00);
+            set => WriteByte(Register.CONTROL, value ? (byte)0x03 : (byte)0x00);
         }
 
         /// <summary>
@@ -194,7 +194,7 @@ public ushort GetRawLuminosity(Channel channel)
                 case Channel.Infrared:
                     return channel1;
                 case Channel.Visible:
-                    return (channel0 > channel1) ? (ushort)(channel0 - channel1) : 0;
+                    return (channel0 > channel1) ? (ushort)(channel0 - channel1) : (ushort)0;
                 default:
                     throw new ArgumentException($"Wrong channel");
             }