add pragma version to all examples

examples/auctions/blind_auction.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 # Blind Auction. Adapted to Vyper from [Solidity by Example](https://github.com/ethereum/solidity/blob/develop/docs/solidity-by-example.rst#blind-auction-1)
 
 struct Bid:

examples/auctions/simple_open_auction.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 # Open Auction
 
 # Auction params

examples/crowdfund.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 ###########################################################################
 ## THIS IS EXAMPLE CODE, NOT MEANT TO BE USED IN PRODUCTION! CAVEAT EMPTOR!
 ###########################################################################

examples/factory/Exchange.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 from ethereum.ercs import ERC20
 
 

examples/factory/Factory.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 from ethereum.ercs import ERC20
 
 interface Exchange:

examples/market_maker/on_chain_market_maker.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 from ethereum.ercs import ERC20
 
 

examples/name_registry/name_registry.vy

@@ -1,3 +1,4 @@
+#pragma version >0.3.10
 
 registry: HashMap[Bytes[100], address]
 

examples/safe_remote_purchase/safe_remote_purchase.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 # Safe Remote Purchase
 # Originally from
 # https://github.com/ethereum/solidity/blob/develop/docs/solidity-by-example.rst

examples/stock/company.vy

@@ -1,3 +1,5 @@
+#pragma version>0.3.10
+
 # Financial events the contract logs
 
 event Transfer:

examples/storage/advanced_storage.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 event DataChange:
     setter: indexed(address)
     value: int128

examples/storage/storage.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 storedData: public(int128)
 
 @deploy

examples/tokens/ERC1155ownable.vy

@@ -1,8 +1,9 @@
+#pragma version >0.3.10
+
 ###########################################################################
 ## THIS IS EXAMPLE CODE, NOT MEANT TO BE USED IN PRODUCTION! CAVEAT EMPTOR!
 ###########################################################################
 
-# @version >=0.3.4
 """
 @dev example implementation of ERC-1155 non-fungible token standard ownable, with approval, OPENSEA compatible (name, symbol)
 @author Dr. Pixel (github: @Doc-Pixel)

examples/tokens/ERC20.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 ###########################################################################
 ## THIS IS EXAMPLE CODE, NOT MEANT TO BE USED IN PRODUCTION! CAVEAT EMPTOR!
 ###########################################################################

examples/tokens/ERC4626.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 # NOTE: Copied from https://github.com/fubuloubu/ERC4626/blob/1a10b051928b11eeaad15d80397ed36603c2a49b/contracts/VyperVault.vy
 
 # example implementation of an ERC4626 vault

examples/tokens/ERC721.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 ###########################################################################
 ## THIS IS EXAMPLE CODE, NOT MEANT TO BE USED IN PRODUCTION! CAVEAT EMPTOR!
 ###########################################################################

examples/voting/ballot.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 # Voting with delegation.
 
 # Information about voters

examples/wallet/wallet.vy

@@ -1,3 +1,5 @@
+#pragma version >0.3.10
+
 ###########################################################################
 ## THIS IS EXAMPLE CODE, NOT MEANT TO BE USED IN PRODUCTION! CAVEAT EMPTOR!
 ###########################################################################