Merge #2912: [Build] Bump master to 5.6.99

2f5249c [Build] Bump master to 5.6.99 (Fuzzbawls)

Pull request description:

  Bumps `master` branch to 5.6.99 now that 5.6.1 has been released.

ACKs for top commit: 2f5249c
  panleone:
    utACK 2f5249c
  Liquid369:
    tACK 2f5249c

Tree-SHA512: ce4abe4e196177100f59f7c54e033937010a4baf3b79b1cbc0b3d73beb58b7120bcd13a66132c815ddfa7c5a65b824c96a479bed8258a9cdc490bc87e438eb99

build-aux/snap/snapcraft.yaml

@@ -2,7 +2,7 @@
 # Copyright (c) 2019 The PIVX developers
 name: pivx-core
 base: core18
-version: 5.5.99
+version: 5.6.99
 summary:   PIVX (Private – Instant – Verified – Transaction)
 description: |
   PIVX is an MIT licensed,

configure.ac

@@ -1,7 +1,7 @@
 dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 5)
-define(_CLIENT_VERSION_MINOR, 5)
+define(_CLIENT_VERSION_MINOR, 6)
 define(_CLIENT_VERSION_REVISION, 99)
 define(_CLIENT_VERSION_BUILD, 0)
 define(_CLIENT_VERSION_RC, 0)