[!] Rised everywhere minimal cmake version to 3.0

3rdparty/json-c/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (json-c)
   
 file(GLOB JSON_C_SRCS FILES *.c)

CMakeLists.txt

 project(cellframe-sdk C)
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 
 set(CMAKE_C_STANDARD 11)
 set(CELLFRAME_SDK_NATIVE_VERSION "2.8-18")

dap-sdk/net/stream/session/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_session)
   
 file(GLOB SESSION_SRCS *.c)

dap-sdk/net/stream/stream/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_stream)
   
 file(GLOB STREAM_SRCS *.c)

modules/app-cli/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_app_cli)
 
 file(GLOB DAP_APP_CLI_SRCS *.c)

modules/chain/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain)
   
 file(GLOB DAP_CHAIN_SRCS *.c)

modules/common/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_common)
   
 file(GLOB DAP_CHAIN_COMMON_SRCS  *.c)

modules/consensus/block-poa/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_block_poa)
 
 file(GLOB DAP_CHAIN_BLOCK_CS_POA_SRCS *.c)

modules/consensus/block-pow/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_block_pow)
   
 file(GLOB DAP_CHAIN_BLOCK_CS_POW_SRCS *.c)

modules/consensus/dag-poa/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_dag_poa)
   
 file(GLOB DAP_CHAIN_DAG_CS_POA_SRCS *.c)

modules/consensus/dag-pos/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_dag_pos)
   
 file(GLOB DAP_CHAIN_CS_DAG_POS_SRCS *.c)

modules/consensus/none/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_none)
   
 file(GLOB DAP_CHAIN_CS_NO_CONSENSUS_SRC *.c)

modules/mempool/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_mempool)
 
 file(GLOB DAP_CHAIN_MEMPOOL_SRC *.c)

modules/mining/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_crypto)
   
 file(GLOB DAP_CHAIN_CRYPTO_SRCS *.c)

modules/modules_dynamic/cdb/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_modules_dynamic_cdb)
 
 file(GLOB DAP_MODULES_DYNAMIC_CDB_SRCS *.c)

modules/net/srv/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv)
 
 file(GLOB DAP_CHAIN_NET_SRV_SRCS *.c libmaxminddb/*.c)

modules/service/app-db/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv_app_db)
   
 file(GLOB DAP_CHAIN_NET_SRV_APP_DB_SRCS *.c)

modules/service/app/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv_app)
   
 file(GLOB DAP_CHAIN_NET_SRV_APP_SRCS  *.c)

modules/service/datum/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv_datum)
   
 file(GLOB DAP_CHAIN_NET_SRV_DATUM_SRCS *.c)

modules/service/mining-pool/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv_datum_pool)
   
 file(GLOB DAP_CHAIN_NET_SRV_DATUM_POOL_SRCS *.c)