This update for libwebp fixes the following issues:

- CVE-2018-25010: Fixed heap-based buffer overflow in ApplyFilter() (bsc#1185685).
- CVE-2020-36330: Fixed heap-based buffer overflow in ChunkVerifyAndAssign() (bsc#1185691).
- CVE-2020-36332: Fixed extreme memory allocation when reading a file (bsc#1185674).
- CVE-2020-36329: Fixed use-after-free in EmitFancyRGB() (bsc#1185652).
- CVE-2018-25012: Fixed heap-based buffer overflow in GetLE24() (bsc#1185690).
- CVE-2020-36328: Fixed heap-based buffer overflow in WebPDecode*Into functions (bsc#1185688).
- CVE-2018-25013: Fixed heap-based buffer overflow in ShiftBytes() (bsc#1185654).
- CVE-2020-36331: Fixed heap-based buffer overflow in ChunkAssignData() (bsc#1185686).
- CVE-2018-25009: Fixed heap-based buffer overflow in GetLE16() (bsc#1185673).
- CVE-2018-25011: Fixed fail on multiple image chunks (bsc#1186247).