[!] Rised everywhere minimal cmake version to 3.0

modules/service/stake/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
-project (dap_chain_net_srv_stake)
-  
-file(GLOB DAP_SRV_STAKE_SRCS *.c)
-
-file(GLOB DAP_SRV_STAKE_HEADERS include/*.h)
-
-add_library(${PROJECT_NAME} STATIC ${DAP_SRV_STAKE_SRCS} ${DAP_SRV_STAKE_HEADERS})
-
-target_include_directories(dap_chain_crypto INTERFACE .)
-target_include_directories(${PROJECT_NAME} PUBLIC include)
-target_link_libraries(${PROJECT_NAME} dap_core dap_crypto dap_chain dap_chain_crypto dap_chain_net dap_chain_net_srv)
+cmake_minimum_required(VERSION 3.0)
+project (dap_chain_net_srv_stake)
+
+file(GLOB DAP_SRV_STAKE_SRCS *.c)
+
+file(GLOB DAP_SRV_STAKE_HEADERS include/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${DAP_SRV_STAKE_SRCS} ${DAP_SRV_STAKE_HEADERS})
+
+target_include_directories(dap_chain_crypto INTERFACE .)
+target_include_directories(${PROJECT_NAME} PUBLIC include)
+target_link_libraries(${PROJECT_NAME} dap_core dap_crypto dap_chain dap_chain_crypto dap_chain_net dap_chain_net_srv)

modules/service/vpn/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_net_srv_vpn)
   
 file(GLOB DAP_CHAIN_NET_SRV_VPN_SRCS *.c)

modules/service/xchange/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
-project (dap_chain_net_srv_xchange)
-  
-file(GLOB DAP_SRV_XCHANGE_SRCS *.c)
-
-file(GLOB DAP_SRV_XCHANGE_HEADERS include/*.h)
-
-add_library(${PROJECT_NAME} STATIC ${DAP_SRV_XCHANGE_SRCS} ${DAP_SRV_XCHANGE_HEADERS})
-
-target_include_directories(dap_chain_crypto INTERFACE .)
-target_include_directories(${PROJECT_NAME} PUBLIC include)
-target_link_libraries(${PROJECT_NAME} dap_core dap_crypto dap_chain dap_chain_crypto dap_chain_net dap_chain_net_srv)
+cmake_minimum_required(VERSION 3.0)
+project (dap_chain_net_srv_xchange)
+  
+file(GLOB DAP_SRV_XCHANGE_SRCS *.c)
+
+file(GLOB DAP_SRV_XCHANGE_HEADERS include/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${DAP_SRV_XCHANGE_SRCS} ${DAP_SRV_XCHANGE_HEADERS})
+
+target_include_directories(dap_chain_crypto INTERFACE .)
+target_include_directories(${PROJECT_NAME} PUBLIC include)
+target_link_libraries(${PROJECT_NAME} dap_core dap_crypto dap_chain dap_chain_crypto dap_chain_net dap_chain_net_srv)

modules/type/blocks/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_blocks)
   
 file(GLOB DAP_CHAIN_BLOCK_SRCS *.c)

modules/type/dag/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_cs_dag)
   
 file(GLOB DAP_CHAIN_DAG_SRCS *.c)

modules/wallet/CMakeLists.txt

-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project (dap_chain_wallet)
   
 file(GLOB DAP_CHAIN_WALLET_SRCS *.c)